The 16 Narrowest Booster Seats: Which One’s The Best Buy?

Can You Have Three Car Seats In The Back?

Yes. It’s possible to have three car seats in the back. However, this will depend on several factors, including:

The size or style of your car seat
The space available inside your vehicle
The style or design of the car seats

Remember that all the car seats must be installed properly for optimum child safety.

For the safest and most comfortable fit, your best bet is to choose slim car seats (for babies and toddlers) and/or narrow booster seats (for older children).

In general, full-sized sedans and wider vehicles such as SUVs or minivans can fit three car seats in the back (or middle row for a three-row vehicle).

Some vehicles don’t have flat seats or seat backs, making installing three car seats challenging.

Below are the 16 narrowest booster seats, arranged depending on the seat option you might need for your little one:

Combination booster seats (2-in-1 or 3-in-1) – Can convert to any or all of the following: harness booster seat, belt-positioning high back booster seat, and/or a backless booster seat
High back booster seats – One configuration only
Backless booster seats – One configuration only

How Wide Are Booster Seats & Which Ones Are Considered “Narrow”?

Car seats and boosters aren’t created equal, but they’re likely within the average range of 17” to 21” in width.

Those that are 19” or slimmer are considered “narrow.”

Are Bigger Seats Safer Than Narrow Boosters?

Bigger and wider seats can be safer and more comfortable for your little one because they tend to have more features (e.g., extra padding for head and side impact protection).

Many might also have steel-reinforced frames, anti-rebound bars, or more advanced installation systems, which can increase their width.

Still, just because bigger seats can be safer, it doesn’t mean that narrow boosters aren’t safe.

Manufacturers must meet the mandatory safety standards for booster seats imposed by ASTM F2640-18 (American Society for Testing and Materials) and regulated by the CPSC (Consumer Product Safety Commission).

Products that don’t meet these standards or have safety issues are recalled by the brands or regulating bodies for your child’s safety.

How Can You Fit Three Booster Seats In Your Car?

Here are some tips to consider before buying three booster seats for your vehicle:

Measure your vehicle’s interior.
Check whether parts or sections (e.g., bulky areas) might interfere with the installation.
Check whether there are ample LATCH (Lower Anchors and Tethers for Children) tether anchors on your vehicle or if you can only use your vehicle’s seat belts for installation.
If possible, choose the narrowest booster seats, especially if your vehicle also has a slimmer width.
It’s also ideal to choose adjustable booster seats to help you find the best configuration for a three-across installation.

We also included a more detailed buyer’s guide below.

Top Reasons For Choosing The Narrowest Booster Seats

You need to fit three car seats inside your car (e.g., for your own children, if you’re planning to have more kids, or for carpooling)
Your vehicle is also on the slimmer side.
You want to ensure that each booster seat provides the optimum protection for your children.

At A Glance: The Narrowest Booster Car Seats

What’s The Narrowest & Slimmest Child Booster Seat?

At 16.25” wide, the Peg Perego Primo Viaggio HBB 120 is the slimmest booster seat on our list.

The following products closely follow it:

Graco TurboBooster Highback Booster Car Seat (16.7” wide)
Graco Affix Highback Booster Seat (16.75” wide)
Peg Perego Viaggio Flex 120 Booster Seat (17.25” wide)

What’s The Slimmest & Skinniest Backless Booster Car Seat?

The Cosco Topside Backless Booster measures 15.5” wide and is the narrowest on our list.

The BubbleBum Inflatable Backless Booster is 11” wide, but it’s a travel portable booster and isn’t ideal for regular use.

What Are The Slimmest Width Car Seats?

Graco and Diono produce some of the narrowest, including convertible car seats (with rear-facing, forward-facing, and booster seat modes) on the market:

Graco True3Fit LX 3-in-1 Convertible Car Seat (16.7” wide)
Graco SlimFit3 LX 3-in-1 Convertible Car Seat (16.7” wide)
Diono Radian 3QXT + First Class Safeplus 4-in-1 Convertible Car Seat (17” wide)
Diono Radian 3QX Safeplus 4-in-1 Convertible Car Seat (17” wide)
Diono Radian 3QXT Safeplus 4-in-1 Convertible Car Seat (17” wide)
Diono Radian 3RXT Convertible Car Seats (17” wide)
Diono Radian 3RXT Safeplus Convertible Car Seats (17” wide)

The Baby Trend Trooper Convertible Car Seat has a width of 16.75”, but it can only be used with traditional rear-facing and forward-facing modes, not as a booster seat.

Highlights: The 15 Most Narrow Car Seats

Combination (2-in-1 or 3-in-1) Booster Seats

Peg Perego Primo Viaggio HBB 120 (16.25” wide) – The narrowest booster seat on our list, with multiple recline positions, an adjustable headrest, the highest capacity (up to 120 lbs), and longest expiry date (12 years)

Graco TurboBooster LX Highback Booster with LATCH System (16.5” wide) – Six-position headrest with height-adjustable head support, full coverage back support, and a budget-friendly price

Chicco KidFit Zip Air Plus 2-in-1 Belt-Positioning Booster Car Seat (17” wide) – Unique zip-on cushioned leg rest, 10 headrest and torso positions, and two recline positions; free from toxic chemicals such as phthalates, brominated chlorinated fire retardants, PFAS (perfluoroalkyl and polyfluoroalkyl substances), and BPA (bisphenol-A)

Evenflo Chase Plus 2-in-1 Harnessed Booster Seat (18.5” wide) – Budget-friendly booster seat with a high capacity (up to 120 lbs; same as the more expensive Peg Perego), and an auto-adjusting RightFit exclusive belt path technology

Cosco Finale DX 2-in-1 Combination Booster Car Seat (19” wide) – Deluxe fabrics, can be used in 5-point safety harness mode, and has a wallet-friendly price

Maxi-Cosi RodiSport Booster Car Seat (19.2” wide) – One-hand adjustable headrest with seven height positions and multiple recline positions, and vehicle lap and shoulder belt guides

High Back Boosters

Peg Perego Viaggio Flex 120 Booster Seat (17.25” wide) – Features unique 4D Total Adjust Technology (with independent adjustments for the seat’s four parts: backrest, the side protections, the headrest, and the seat), five different recline positions, and a compact fold (ideal for traveling or moving the booster seat around; learn more about this below); has the highest capacity (up to 63”) among all the high back only boosters on our list

Chicco MyFit Zip Air Booster Car Seat (17.5” wide) – Contoured ErgoBoost seat with dual-density foam padding and a padded waist belt, nine headrest positions, four recline positions, two crotch positions, and easy zip-off design for quick seat cover removal or replacement; free from toxic chemicals (e.g., fire retardant chemicals, PFAS, BPA, or phthalates)

Diono Everett NXT Rigid Latch (18.5” wide) – Adjustable seven-position headrest with protective head support that has reinforced side impact protection

Uppababy ALTA Premium High Back Booster (19” wide) – Safetech fabrics (original, untreated fire retardant-free fabrics that are free from harmful chemicals), adjustable seven-position, active-support headrest, and Side Impact Protection pods

Nuna Aace High Back Booster Car Seat (widest at 22.5” wide) – GREENGUARD Gold Certified (low chemical emissions), flame-resistant fabric without using toxic fire-retardant chemicals, and multiple adjustable positions and seat depths to accommodate and support your child’s growing legs

Backless Boosters

Cosco Topside Backless Booster (15.5” wide) – Extra-plush pad with a lightweight design and Rigid LATCH connectors

Chicco GoFit Backless Booster Car Seat (17” wide) – ErgoBoost seat with double-foam padding for your child’s added comfort, free from toxic chemicals, and has a built-in carry handle for easy transport

Peg Perego Shuttle 120 Booster Car Seat (17.25” wide) – Dual layer comfort with a double layer of expanded material, breathable and moisture-absorbent fabric, and integrated rigid LATCH system, Blind Lock Attaching System (to prevent accidental car seat release by another passenger), longest expiration date (12 years), and among the seats with the highest capacity (up to 63”)

Graco TurboBooster LX Backless Booster with LATCH (17.5” wide) – Secured booster seat with a front-adjust LATCH system, shoulder belt positioner, and Graco ProtectPlus Engineered certification (for optimum crash protection)

Diono Solana 2 Backless Booster Car Seat (18.5” wide) – Ergonomic, contoured base with deep padded cushion, integrated 2-in-1 arm rests and belt path guide, and high-grade steel LATCH connectors

Continue reading our narrowest booster seat review for more detailed information about these products.

Combination (2-in-1 or 3-in-1) Booster Seats

Peg Perego Primo Viaggio HBB 120 (16.25” wide)

What Makes It Special?

Best Features: Adjustable headrest with a six-position head panel; recline options with the multi-position back rest

Conversion Options: High back or backless booster

Capacity: 40 – 120 lbs; up to 57” tall (maximum height)

Safety Features

Energy-absorbing EPS (expanded polystyrene) foam in the head panel can protect your child’s head in a crash
Back support
Total Side Impact Protection

Key Features

Material: Metal frame, foam, two-toned fabrics, and plastic

Installation Options: Seat belt or using LATCH connectors (keeps the booster anchored to your vehicle even when not in use)

Other Specifications

Seat Dimensions: 18″ x 16.25″ x 27″

Weight: 12 lbs

Warranty: Two years from the date of purchase

Expiration: 12 years from the date of purchase

Washability: Not indicated

Extra Features

Pull-out cup holders located on each side
Available in three colors (black, licorice, and Monza – a combination of black and red)

Product Recall

None

Cons

Some complaints about the product quality and durability (e.g., parts breaking off after a few years of use)

What Customers Say

Positive Reviews

“For it’s style, quality of materials, durable construction, variety and ease of adjustments, comfortable ride, and of course, the side-impact protection provided, I am incredibly pleased with our Peg Perego booster.” – Reviewer on Amazon

“My son outgrew his carseat and we thought we would stick to the same brand but discovered it didn’t provide side-impact protection. This Peg Perego model DOES! And it is Italian made and shows it! Clips on securely with seat belt guides to make buckling up a cinch, even for the little one who is wanting to be more independent and responsible. Great features are height adjustment, recline (slight but effective) and that you can adjust without uninstalling the booster.” – Reviewer on Amazon

Negative Reviews

“After three years of typical, everyday use, one of the arm rests broke off our booster seat.” – Reviewer on Amazon

“While the booster seems to be VERY well made – it does not stay in place in my car. This is not my first seat or first car. So do not throw away the packaging like I did. BMW X6 seats and this booster not a match.” – Reviewer on Amazon

Graco TurboBooster LX Highback Booster with LATCH System (16.5” wide)

What Makes It Special?

Best Features: Six-position headrest with height-adjustable head support

Conversion Options: High-back or backless booster modes

Capacity: 40-100 lbs or up to 57” tall; around 4-10 years old

Safety Features

Full coverage back support
EPS energy-absorbing foam
Graco ProtectPlus Engineered (certified to be designed and tested for children’s protection in a frontal, rear, or rollover crash

Key Features

Material: Metal, plastic, foam, and fabric

Installation Options: Seat belt installation (with open-loop belt guides) or LATCH (with one-hand front adjustment)

Other Specifications

Seat Dimensions: 25.4” x 16.5” x 10.5”

Weight: 10.76 lbs

Warranty: One year

Expiration: 10 years after the manufacturing date (check your product’s label)

Washability: Machine-washable seat cushion

Extra Features

Hideaway storage compartment
Hideaway cup holders

Product Recall

None

Cons

Some complaints about the product’s quality (e.g., being too flimsy or issues with the headrest adjustments)

What Customers Say

Positive Reviews

“Very easy to assemble and install. My son loves that he can buckle/unbuckle himself now.” – Reviewer on Graco Baby

“Great booster seat. Our 4 yo was using the 4-in-1 booster option but we want to use that Graco seat for the next kid so we upgraded our booster seats. These are much lower profile than the Graco 4-in-1 which we appreciate bc our 4 yo’s feet were kicking/crunching on the front seats. These were a great call as he has much more room. I wanted the high back as he still only 4 and the back provides nice support and a “boundary” as he learns to sit in his seat the whole ride (not leaning forward/ to the side).” – Reviewer on Walmart

Negative Reviews

“Very flimsy and felt it was not safe for my granddaughter.” – Reviewer on Amazon

Chicco KidFit Zip Air Plus 2-in-1 Belt-Positioning Booster Car Seat (17” wide)

What Makes It Special?

Best Features: Unique zip-on cushioned leg rest, 10 headrest and torso positions, and two recline positions

Conversion Options: Belt-positioning high-back or backless booster seat

Capacity: 40-100 lbs, at least four years old, or 38-57” tall (high-back mode); 40-110 lbs (backless mode)

Safety Features

Free from phthalates, brominated chlorinated fire retardants, PFAS, and BPA
DuoGuard provides two layers of protection: rigid shell that has steel reinforcement and high-quality, energy-absorbing EPS foam
Force-multiplying SuperCinch stabilizer with one-pull tightener
3D AirMesh breathable fabrics (offer better air circulation)

Key Features

Material: Metal, plastic, foam, and 100% polyester fabric

Installation Options: Vehicle’s seat belt or LATCH (with premium, quick-release connectors)

Other Specifications

Seat Dimensions: 20” x 17” x 26”

Weight: 11 lbs

Warranty: Not indicated; the website instructs consumers to message the company (chiccousa.com/contactus) for warranty questions

Expiration: Not indicated; check the label on the car seat’s base for the expiration date

Washability: Removable, machine-washable fabrics (seat pads and armrest covers)

Extra Features

Removable two-position backrest that mimics the vehicle seat position
Integrated side wings
Contoured ErgoBoost Plus seat that has extra padding (with three layers of foam) for your child’s added comfort
Bonus kid console
Two space-saving cup holders
Easy zip-off pads and cushions

Product Recall

None

Cons

It was involved in a lawsuit filed at the Southern District Court of New York on March 8, 2023, over “misrepresentation” about the side-impact collision protection and the product’s minimum weight limit of “KidFit” products. (1)

The case was settled out of court, with customers who bought Chicco “KidFit” branded booster seats anytime from April 22, 2015, through December 31, 2021, being eligible for a refund: (1)

$50 (if they bought the car seat directly from chiccousa.com or with proof of purchase from authorized outlets)
$25 (without proof of purchase)

The court announcement clarified, however, that the settlement was done to avoid the expense of continuing the lawsuit. It wasn’t an admission of fault or wrongdoing. (1)

What Customers Say

Positive Reviews

“Besides it’s comfortability, the car seat has many great features. Our favorite one is the leg rest.” – Reviewer on Walmart

Negative Reviews

“The latch that holds the back onto the base keeps slipping when I try to tilt it backward.” – Reviewer on Walmart

Evenflo Chase Plus 2-in-1 Harnessed Booster Seat (18.5” wide)

What Makes It Special?

Best Features: RightFit exclusive belt path technology (ensures a proper fit by auto-adjusting your vehicle’s seat belt to the correct height when you adjust the headrest)

Conversion Options: Forward-facing harnessed booster seat and high back booster

Capacity: 22 – 40 lbs and at least two years old (forward-facing 5-point harnessed booster seat); 40 – 120 lbs and at least four years old (high back booster)

Safety Features

Side impact standard
5-point safety harness (in forward-facing mode for younger kids)
Meets or exceeds all applicable (booster seat) federal safety standards
Designed and tested to withstand approximately twice the federal crash test standard

Key Features

Material: Metal, foam, plastic, and fabric

Installation Options: Vehicle’s seat and the LATCH or tether system

Other Specifications

Seat Dimensions: 18” x 18.5” x 29.5”

Weight: 11 lbs

Warranty: 90 days

Expiration: Not indicated; check your car seat’s label

Washability: Removable and machine-washable padded seat

Extra Features

Dual, integrated cup holders
Real-time online assistance from ParentLink customer service experts
Available in three colors (Grenada green, Huron black, and Geneva pink)

Product Recall

On April 4, 2014, an older version of this booster seat (model number 306; sold from June 12, 2012, through October 3, 2013) was recalled along with other Evenflo car seats over issues with the harness crotch buckle. (2)

According to the recall advisory, the buckle might have unlatching issues and could get stuck, particularly due to exposure to contaminants such as food and drinks. (2)

The stuck buckle might put the child in danger if they must be immediately removed from the vehicle after a crash. (2)

Affected customers were sent a replacement buckle with instructions on properly installing it. (2)

The recall is no longer in effect. (2)

Cons

Some complaints about quality, comfort issues, and customer service
An older version of this car seat had a recall
Shorter warranty period (90 days) than most brands (typically 12 months)

What Customers Say

Positive Reviews

“Easy to install lightweight and fits perfectly in the back seat of a mini cooper! My 4 yr old says it’s comfortable.” – Reviewer on Evenflo

Negative Reviews

“The padding is very thin and the clips where the fabric connects to the seat keep popping off every time my child is sitting in it. No matter how hard I push it back in it constantly pops off.” – Reviewer on Evenflo

Cosco Finale DX 2-in-1 Combination Booster Car Seat (19” wide)

What Makes It Special?

Best Features: Deluxe fabrics; IIHS (Insurance Institute for Highway Safety) Best Bet rating for use in booster mode

Conversion Options: Forward-facing booster (with a 5-point safety harness) and belt-positioning booster seat (with vehicle’s seat belt)

Capacity: 30 – 65 lbs, 32” – 49”, and at least one year old (forward-facing with harness); 40 – 100 lbs and 43” – 52” (belt-positioning booster)

Safety Features

5-point safety harness (in forward-facing mode for younger kids)

Key Features

Material: Metal, plastic, and neoprene fabric

Installation Options: Vehicle seat belt or LATCH system

Other Specifications

Seat Dimensions: ‎18.25” x 19” x 29.75”

Weight: 11.5 lbs

Warranty: One year from the date of purchase

Expiration: 10 years from the manufacturing date

Washability: Easy-to-clean, machine-washable and dryable fabrics

Extra Features

Removable, dishwasher-safe cup holder on either side of the seat

Product Recall

None

Cons

Some complaints about quality and comfort (e.g., buckle issues, short straps, and the car seat lacking padding between the cover and the base

What Customers Say

Positive Reviews

“The seat is a great size- I could fit 3 seats across but best of all was the fabric and how easy it was to remove, wash and put back together.” – Reviewer on Cosco Kids

Negative Reviews

“Very cheap and poorly constructed. There is absolutely no padding in this seat. The “seat” has holes in the plastic base that you can actually feel thru the fabric covering. Definitely not comfortable by any means.” – Reviewer on Amazon

Maxi-Cosi RodiSport Booster Car Seat (19.2” wide)

What Makes It Special?

Best Features: One-hand adjustable headrest with seven height positions and multiple recline positions

Conversion Options: Traditional booster car seat and backless booster

Capacity: 40 – 100 lbs and 43” – 57″ tall

Safety Features

Vehicle lap and shoulder belt guides

Key Features

Material: Metal, plastic, foam, and polyester

Installation Options: Vehicle’s seat belt and LATCH system (with rigid connectors)

Other Specifications

Seat Dimensions: 35.1” x 19.2” x 10.3”

Weight: 15.85 lbs

Warranty: One year from the date of purchase

Expiration: 10 years

Washability: Removable, machine-washable, and dryer-safe padding

Extra Features

Available in three colors (polished pebble gray, midnight black, and essential blue)
Removable cup holder

Product Recall

None

Cons

Some complaints about the shoulder belt slipping out of the belt guide, posing a safety risk

What Customers Say

Positive Reviews

“Couldn’t be happier with the quality of the fabric, the comfort of the seat, and the overall feel. Feels sturdy and well made.” – Reviewer on Maxi-Cosi

Negative Reviews

“It was infuriating to find out that, in just about a week, the seat belt had slipped out of the belt guide hook. Now I have to always look out to see if it slipped out or not.” – Reviewer on Amazon

High Back Boosters

Peg Perego Viaggio Flex 120 Booster Seat (17.25” wide)

What Makes It Special?

Best Features: 4D Total Adjust Technology (independent adjustments for the backrest, the side protections, the headrest, and the seat); five different recline positions

Conversion Options: High back booster seat only

Capacity: 40 to 120 lbs; up to 63”

Safety Features

Reinforced aluminum back
Adjustable Side Impact Protection
Blind Lock Attaching System (prevents accidental release by another passenger)

Key Features

Material: Metal, foam, plastic, fabric, and leather

Installation Options: Integrated rigid LATCH connectors or the vehicle’s seat belt

Other Specifications

Seat Dimensions: 22″ x 17.25″ x 26.75″

Weight: 14 lbs

Warranty: Two years from the date of purchase

Expiration:12 years from the date of purchase

Washability: Removable, machine-washable covers

Extra Features

Anatomically-shaped seat with expanded foam cover for added comfort
Available in three colors (crystal black, John Deere with the company’s logo, licorice gray, Monza in black and red, and wonder gray)
Folds down on itself even while attached using the rigid LATCH connectors
Two cup holders that fold into the car seat’s base
Folds into a compact, travel-friendly pack (see photo below)

Product Recall

None

Cons

Can be pricey
Some complaints about the product requiring “too many adjustments” before getting the right fit

What Customers Say

Positive Reviews

“It is easy to put in the car using the two clip things that snap onto the child seat latches in our car/truck, making it easy to move from one vehicle to another.” – Reviewer on Amazon

Negative Reviews

“Horrible seat. Looks nice and sleek but the product itself has way too many adjustments to get a good belt fit. Seats aren’t very comfortable. Very little padding.” – Reviewer on Amazon

Chicco MyFit Zip Air Booster Car Seat (17.5” wide)

What Makes It Special?

Best Features: Contoured ErgoBoost seat with dual-density foam padding and a padded waist belt; nine headrest positions, four recline positions, and two crotch positions

Conversion Options: Front-facing 5-point harness seat and belt-positioning booster

Capacity: 25 – 65 lbs, up to 54” tall, and at least two years old (harness mode); 40-100 lbs, 38” – 57” tall, and at least four years old (booster mode)

Safety Features

Free from chlorinated or brominated fire retardant chemicals, PFAS, BPA, or phthalates
5-point padded, no-rethread safety harness (in forward-facing mode for younger kids)
DuoGuard offers two layers of protection: rigid shell with reinforced steel frame and energy-absorbing EPS foam
Breathable backrest (for ventilation)
SuperCinch tightener
LockSure belt-tightening system
ReclineSure leveling system
RideRight bubble levels (to verify installation angle)

Key Features

Material: Steel, foam, plastic, and 100% polyester fabric

Installation Options: Vehicle seat belt or premium LATCH connectors

Other Specifications

Seat Dimensions: 21” x 17.5” x 26”

Weight: 26 lbs

Warranty: Not indicated; consumers are instructed to message the company (chiccousa.com/contactus) for warranty questions

Expiration: Not indicated; check the label on your car seat’s base for the expiration date

Washability: Machine-washable, easy-to-remove seat pads

Extra Features

Easy zip-off design for quick seat cover removal or replacement
Space-saving, dishwasher-safe cup holders (they can fold out of the way when not in use)
Bonus storage console

Product Recall

None

Cons

Can be pricey
Some complaints about the booster seat having painful shoulder straps, the product being smaller than advertised, and quality issues (e.g., it fell apart within just a few months)

What Customers Say

Positive Reviews

“This car seat truly grows with our child. It’s easy to install and it’s easy to clean (because we all know toddlers love snacks).” – Reviewer on Target

Negative Reviews

“We bought this seat less than 6 months ago. The back fell apart while I was cleaning my car. It’s a piece of junk.” – Reviewer on Walmart

Diono Everett NXT Rigid Latch (18.5” wide)

What Makes It Special?

Best Features: Adjustable seven-position headrest

Conversion Options: High back booster only

Capacity: 40 – 120 lbs, from 38” – 63” tall

Safety Features

Easy-click rigid LATCH connectors
Protective head support with reinforced side impact protection

Key Features

Material: Metal, foam, plastic, and fabric (94% polyester and 6% spandex)

Installation Options: Vehicle seat belt or LATCH system

Other Specifications

Seat Dimensions: 14.8” x 18.5” x 27.6”

Weight: 11.1 lbs

Warranty: 12 months from date of purchase, extends to 36 months upon product registration; can extend to 10 years with paid Lifetime Journey Care subscription

Expiration: Not indicated

Washability: Washable cover (follow instructions on the product care tag)

Extra Features

Available in four solid colors (black, blue, purple, and red)

Product Recall

None

Cons

Some complaints about design flaws (e.g., the shoulder belt straps might rub on children’s skin)
No cupholders (sold separately)

What Customers Say

Positive Reviews

“I liked a lot about this seat — it’s very narrow, which worked great in our car.” – Reviewer on Amazon

Negative Reviews

“It was quite difficult to install. Required a lot of force to secure. My son, who is within the height and weight parameters for use, has a mark on his neck from the seatbelt rubbing.” – Reviewer on Amazon

Uppababy ALTA Premium High Back Booster (19” wide)

What Makes It Special?

Best Features: Adjustable seven-position, active-support headrest

Conversion Options: High back booster seat only

Capacity: 40 – 100 lbs, 38” – 57” tall, and around 6 – 10 years old

Safety Features

Safetech fabrics (untreated fire retardant-free fabrics; free from harmful chemicals)
Specialized foams in the headrest
SecureFit Belt Routing System (includes a lap belt positioner) to ensure a proper fit
Side Impact Protection pods
Dual armrests

Key Features

Material: Metal, plastic, foam, and fabric

Installation Options: Vehicle seatbelt and rigid LATCH connectors

Other Specifications

Seat Dimensions: 20” x 19” x 25.5” – 33”

Weight: 16.6 lbs

Warranty: Limited lifetime warranty (until the expiration date indicated on the product); requires online product registration within three months from purchase date and a valid receipt from an authorized retailer

Expiration: Not indicated; check your car seat’s label for the expiration date

Washability: Removable, washable fabrics

Extra Features

Removable cup holder

Product Recall

None

Cons

Some complaints about issues with seat belt locks (e.g., either the seat belt locks all the time or the seat belt doesn’t return into place after a child moves from the spot)

What Customers Say

Positive Reviews

“Lightweight. Not bulky. Looks great! Easy to install. Comfortable for my boy.” – Reviewer on Amazon

Negative Reviews

“Almost every time seat belt locks and I literally have to remove the whole car seat to undo the seat belt. Pain.” – Reviewer on Amazon

Nuna Aace High Back Booster Car Seat (widest at 22.5”)

What Makes It Special?

Best Features: Adjustable nine-position headrest, eight recline positions, and three adjustable seat depths to accommodate and support your child’s growing legs

Conversion Options: High-back and no-back booster seat

Capacity: 40 – 110 lbs, 38” – 60” tall, and at least 4 years old (high back booster); 50 – 120 lbs, 38” – 60” tall, and at least 5 years old (no back booster)

Safety Features

GREENGUARD Gold Certified (low chemical emissions)
Flame-resistant fabric and foam but without using toxic fire-retardant chemicals
Energy-absorbing foam plus side-impact protection pods
Ventilation panels with breathable and washable knit fabrics
Built-in armrests

Key Features

Material: Metal, plastic, foam, and fabric

Installation Options: Vehicle seatbelt (with belt positioner aid for shoulder seat belt routing and colored belt path indicators) or lower anchor connectors

Other Specifications

Seat Dimensions: 15 x 22.5 X 33 inches

Weight: 15.6 lbs

Warranty: Two years

Expiration: Ten years

Washability: Removable, washable fabrics

Extra Features

Dishwasher-safe cup holder

Product Recall

None

Cons

It’s the widest booster seat option on our list.
It can be pricier than the other booster seats.
It doesn’t convert to a traditional rear-facing or forward-facing car seat, unlike other convertible options.

What Customers Say

Positive Reviews

“Works for our 3 year old going on 4. She says she’s comfy and likes being able to use a regular seat belt. The bottom of the seat is able to extent when her legs grow longer for comfort.” – Reviewer on Nordstrom.

Negative Reviews

“Unfortunately the back part of the booster is too straight and the car seat strap is a little challenging for him to thread it through each time to make sure it goes over his chest correctly. I thought the back would lean backward a little to be in more of a reclining position but the only way we can get it is at about a 90 degree angle.” – Reviewer on Nordstrom.

Backless Boosters

Cosco Topside Backless Booster (15.5” wide)

What Makes It Special?

Best Features: Extra-plush pad with a lightweight design

Conversion Options: Backless booster only

Capacity: 40 – 100 lbs and 43” – 57” tall

Safety Features

Rigid LATCH connectors anchor it in place

Key Features

Material: Metal, plastic, foam, and fabric

Installation Options: Vehicle seatbelt and LATCH connectors

Other Specifications

Seat Dimensions: 14” x 15.5” x 6.5”

Weight: 2 lbs

Warranty: One year from the date of purchase

Expiration: Six years from the date of manufacture

Washability: Removable, machine-washable cover (only if indicated on your booster seat’s label)

Extra Features

Seat-safe design that leaves vehicle seats unmarked

Product Recall

None

Cons

Some complaints about thin padding (not as advertised) and design issues (e.g., it brings the belt to the child’s thighs, not against the hips)

What Customers Say

Positive Reviews

“Love this booster as an extra! Easy to move from car to car, no bulky cup holders or extra unnecessary weight.” – Reviewer on Amazon

Negative Reviews

“Padding is not as thick and comfortable as made to believe. Also brings straps to far down onto legs instead of lap.” – Reviewer on Amazon

Chicco GoFit Backless Booster Car Seat (17” wide)

What Makes It Special?

Best Features: ErgoBoost seat that has double-foam padding for your child’s added comfort

Conversion Options: Backless booster seat only

Capacity: 40 – 110 lbs, 38 – 57” tall, and at least four years old

Safety Features

Free from PFAS, BPA, phthalates, and brominated or chlorinated fire retardants
Integrated lap belt guides
Shoulder belt clip

Key Features

Material: Metal, plastic, foam, and 100% polyester fabric

Installation Options: Vehicle seat

Other Specifications

Seat Dimensions: 15” x 17” x 8.5”

Weight: 6 lbs

Warranty: Not indicated; consumers are told to message the company via chiccousa.com/contactus for warranty questions

Expiration: Not indicated; check the label on your car seat’s base for the expiration date

Washability: Removable, machine-washable covers (including the armrest fabrics)

Extra Features

Built-in carry handle (for portability in traveling or switching between vehicles)
Smooth, non-marking underside (can help protect the vehicle seats from damage)
Two removable and dishwasher-safe cup holders

Product Recall

None

Cons

Doesn’t have LATCH connectors, posing safety risks
Some complaints about encountering installation difficulties with this booster seat

What Customers Say

Positive Reviews

“The seat is constructed very well and my granddaughter is very comfortable in it. Easy to remove if not needed.” – Reviewer on Amazon

Negative Reviews

“Not having latch doesn’t work for us. The carpool line doesn’t wait for the kids to reclick the belt, and it’s dangerous having it unrestrained.” – Reviewer on Chicco USA

Peg Perego Shuttle 120 Booster Car Seat (17.25” wide)

What Makes It Special?

Best Features: Dual layer comfort (double layer of expanded material) with breathable, moisture-absorbent fabric

Conversion Options: Backless booster seat only

Capacity: 40 – 120 lbs and up to 63”

Safety Features

Integrated rigid LATCH system
Blind Lock Attaching System (prevents accidental release by another passenger)

Key Features

Material: Metal, plastic, foam, and fabric

Installation Options: Vehicle seatbelt and rigid LATCH system

Other Specifications

Seat Dimensions: 16” x 17.25” x 9.5”

Weight: 6 lbs

Warranty: Two years from the date of purchase

Expiration:12 years from the date of purchase

Washability: Removable, machine-washable fabrics

Extra Features

Includes a clip-on cup holder
Integrated carry handle for easy transportation

Product Recall

None

Cons

Can be pricey

What Customers Say

Positive Reviews

“The booster safely connects with a clip in system so that there is no slipping and sliding.” – Reviewer on Amazon

Negative Reviews

“…this booster seat MADE for BIGGER children is actually smaller and narrower and much less comfortable and roomy. So so disappointed.” – Reviewer on Amazon

Graco TurboBooster LX Backless Booster with LATCH (17.5” wide)

What Makes It Special?

Best Features: Secured booster seat with a front-adjust LATCH system

Conversion Options: Backless booster seat only

Capacity: 40-100 lbs and 43-57” tall

Safety Features

Graco ProtectPlus Engineered (certified to be designed and tested against the most rigorous crash tests during a rear, frontal, or rollover crash)
Shoulder belt positioner

Key Features

Material: Metal, foam, plastic, and fabric

Installation Options: Vehicle seatbelt and LATCH system (front adjustments for quick installation)

Other Specifications

Seat Dimensions: 8.64” x 17.5” x 15.5”

Weight: 5.56 lbs

Warranty: One year

Expiration: 10 years after the manufacturing date

Washability: Removable, machine-washable seat pad

Extra Features

Includes easy-to-clean cup holder

Product Recall

None

Cons

Some complaints about possible safety risks (e.g., the child tipping over)

What Customers Say

Positive Reviews

“It’s easy and lightweight and virtually anyone can figure out how to strap the kid in it.” – Reviewer on Amazon

Negative Reviews

“There’s literally nothing keeping your child from tipping over, even when you turn the corner.” – Reviewer on Graco Baby

Diono Solana 2 Backless Booster Car Seat (18.5” wide)

What Makes It Special?

Best Features: Ergonomic, contoured base with deep padded cushion

Conversion Options: Backless belt-positioning booster seat only

Capacity: 40 – 120 lbs and up to 63”

Safety Features

Integrated 2-in-1 arm rests and belt path guide
High-grade steel LATCH connectors

Key Features

Material: Metal, fabric, foam, and plastic

Installation Options: Vehicle’s seat belt and the LATCH system (with integrated connectors and easy-adjust straps)

Other Specifications

Seat Dimensions: 9.4” x 18.5” x 16.1”

Weight: 6.1 lbs

Warranty: 12 months from date of purchase, extends to 36 months upon product registration; can extend to 10 years with paid Lifetime Journey Care subscription

Expiration: Not indicated

Washability: Easy-remove, machine-washable cover

Extra Features

Two fold-away cups and snack trays

Product Recall

None

Cons

Some complaints about the seat being uncomfortable (e.g., thin padding) and about design issues (e.g., the back being curved the “wrong way”)

What Customers Say

Positive Reviews

“A lot more comfortable than most. The seat cover stays in place and I love the anchors so it doesn’t slide off the seat when she gets out.” – Reviewer on Amazon

Negative Reviews

“This booster has a hard plastic bump at the back which is barely covered by padding. My daughter says it’s too uncomfortable to use.” – Reviewer on Amazon

Summary & Recommendations: The Best Narrow Booster Seats

These different booster seats have varied pros and cons.

Choosing the booster that can meet your needs, budget, child’s height and weight, and the other factors we mentioned in the buying guide above is ideal.

Below are our recommendations to help you choose.

Combination (2-in-1 or 3-in-1) Booster Seats

Choose Peg Perego Primo Viaggio HBB 120 (16.25” wide) if you prefer:

The narrowest booster seat
One with multiple recline positions and an adjustable headrest
The highest capacity (up to 120 lbs)
The longest expiry date (12 years)
You don’t mind the price tag

Choose Graco TurboBooster LX Highback Booster with LATCH System (16.5” wide) if you want:

A six-position headrest with height-adjustable head support
Full coverage back support
A budget-friendly price

Choose Chicco KidFit Zip Air Plus 2-in-1 Belt-Positioning Booster Car Seat (17” wide) if you like:

Having a unique zip-on cushioned leg rest
One with multiple headrest and torso positions, and two recline positions
A booster free from toxic chemicals

Choose Evenflo Chase Plus 2-in-1 Harnessed Booster Seat (18.5” wide) if you want:

A budget-friendly booster seat with a high capacity (up to 120 lbs)
One with auto-adjusting RightFit exclusive belt path technology

Choose Cosco Finale DX 2-in-1 Combination Booster Car Seat (19” wide) if you prefer:

Deluxe fabrics
Having a 5-point safety harness mode
Wallet-friendly price

Choose Maxi-Cosi RodiSport Booster Car Seat (19.2” wide) if you’re looking for:

One-hand adjustable headrest with seven height positions and multiple recline positions
A booster that has vehicle lap and shoulder belt guides
You don’t mind the price tag

High Back Boosters

Choose Peg Perego Viaggio Flex 120 Booster Seat (17.25” wide) if you prefer:

Having unique 4D Total Adjust Technology (with independent adjustments for the seat’s four parts)
Five different recline positions
One with a compact fold (for traveling or moving the booster seat around)
The highest capacity (up to 63”) among all the high back-only boosters
You don’t mind the price tag

Choose Chicco MyFit Zip Air Booster Car Seat (17.5” wide) if you want:

A contoured ErgoBoost seat with dual-density foam padding and a padded waist belt
Nine headrest positions, four recline positions, plus two crotch positions
An easy zip-off design for quick seat cover removal or replacement
One that’s free from toxic chemicals
You don’t mind the price tag

Choose Diono Everett NXT Rigid Latch (18.5” wide) if you like:

An adjustable seven-position headrest with protective head support
One that has reinforced side impact protection

Choose Uppababy ALTA Premium High Back Booster (19” wide) if you’re looking for:

A booster free from toxic chemicals
Adjustable seven-position and active-support headrest
One that has Side Impact Protection pods

Choose Nuna Aace High Back Booster Car Seat (22.5” wide) if you prefer:

GREENGUARD Gold Certified (for low chemical emissions)
Flame-resistant fabric without toxic fire-retardant chemicals
One that has multiple adjustable positions and seat depths to support your child’s growing legs
You don’t mind that it’s the widest car seat on our list

Backless Boosters

Choose Cosco Topside Backless Booster (15.5” wide) if you prefer:

An Extra-plush pad with a lightweight design and Rigid LATCH connectors

Choose Chicco GoFit Backless Booster Car Seat (17” wide) if you want:

An ErgoBoost seat with double-foam padding for your child’s added comfort
One that’s free from toxic chemicals
A built-in carry handle for easy transport

Choose Peg Perego Shuttle 120 Booster Car Seat (17.25” wide) if you like:

Dual-layer comfort with a double layer of expanded material
Breathable and moisture-absorbent fabric
Integrated rigid LATCH system
Blind Lock Attaching System (to prevent accidental car seat release)
The longest expiration date (12 years)
The highest capacity (up to 63”)
You don’t mind the price tag

Choose Graco TurboBooster LX Backless Booster with LATCH (17.5” wide) if you prefer:

A secured booster seat with a front-adjust LATCH system
One with a shoulder belt positioner
Optimum crash protection (backed by the Graco ProtectPlus Engineered certification)

Choose Diono Solana 2 Backless Booster Car Seat (18.5” wide) if you want:

An ergonomic, contoured base with deep padded cushion
Integrated 2-in-1 arm rests and belt path guide
High-grade steel LATCH connectors

Buyer’s Guide: How To Choose The Narrowest Booster Seats

Booster Seat Safety

Material

Protect your kids from the ill effects of toxic chemicals (such as BPA or bisphenol-A, heavy metals, phthalates, or fire retardants) by only choosing safe products.

Read Motherhood Community’s health and safety philosophy for more information about these harmful chemicals and how you can limit your children’s exposure.

Installation Options (Using LATCH Or Vehicle Seat Belt)

Check whether the booster seat needs to be installed using LATCH or your vehicle’s seat belt. If through LATCH, double-check whether your vehicle has three sets of tether anchors.

High Back Booster Vs. Backless Booster: Which One’s Safer?

While they’re both designed to protect your child, a high back booster can be safer because it’s likely to have more features (e.g., side-impact protection, head support, more secure attachments with your vehicle’s belt, etc.).

Are Secondhand Or Used Booster Seats Safe?

We don’t recommend buying secondhand car seats or car boosters. They may be unable to protect your child due to the following reasons:

Child car seats (no matter the design, style, or brand) expire; you might unknowingly buy an already-expired seat.
With wear and tear, a car seat’s quality and capacity to provide protection decreases over time.
You might buy a recalled car seat (some of these recalled products continue to be sold on online marketplaces, such as Meta and eBay) with safety issues.
As a secondhand user, you might not be entitled to the rights and privileges of a firsthand owner, especially when it comes to warranty claims or being informed that your booster seat has been recalled.

Check For Recalls

No matter what type of booster or car seat you’re looking for, it’s also important to check for recalls. Recalled products can compromise your children’s safety.

Here are some recent car seat recalls:

Cybex recall (2023)
Maxi Cosi recalls (2023)
Safety 1st recalls (2023)
Baby Trend stroller and car seat recalls (2022)
UPPAbaby stroller and car seat recalls (2022)
Maxi Cosi Pria 85 recall (2021)

If you have car seats you no longer use, consider taking them to the Target Car Seat Trade-In Program (a 2-week event usually scheduled in April and September) to swap your used products for a 20% discount coupon that you can use for various baby essentials.

Stay informed with the latest safety and recall news by signing up for regular Motherhood Community alerts.

Finding The Right Fit & Combination Or Arrangement

Consider Your Car’s Size & Interiors

In theory, the narrowest car seats can fit in a three-across configuration. However, the right fit will still depend on the size and design of your vehicle’s actual seats.

Refer to your vehicle’s manual for the interior sizes or check the seat dimensions using a measuring device.

Double-check that the seats and backs don’t have bumps or other features that can interfere with your car seat installation.

For example, some vehicles have middle-row seats that look like this, making it a challenge to add a child car seat in the middle:

(source: toyota.com)

The Best Cars For Narrow Booster Seats

Vehicles that can be ideal for a three-across configuration:

Minivans (e.g., Honda Odyssey, Chrysler Pacifica, Kia Carnival, Toyota Sienna, or Dodge Caravan)
Full-size sedans (e.g., Toyota Crown, Dodge Charger, Ford Taurus, Chrysler 300, or Chevrolet Impala)
Midsize SUVs (e.g., Hyundai Santa Fe, Jeep Grand Cherokee, Honda Pilot, Nissan Pathfinder, Toyota Highlander, or Ford Explorer)
Full-sized SUVs (e.g., Chevrolet Tahoe, Toyota Land Cruiser, Ford Expedition, or Nissan Armada)
Luxury cars (e.g., Mercedes Benz models like GLE and GLS, BMW X7, Range Rover Discovery)

Cars That Might Be Challenging For 3-Across Configuration

It might be challenging to fit three car seats in slimmer cars, even when you’re installing the narrowest boosters. This can also hold true for sports cars or other vehicles not designed for general family use.

Some of these vehicles include:

Compact SUVs (e.g., Toyota RAV4, Honda CR-V, Mazda CX-5, Ford Escape, or Mitsubishi Eclipse Cross)
Sports cars (e.g., Chevrolet Camaro, Ford Mustang, Porsche 718 Cayman, Subaru BRZ, or Toyota GR86)

Consider The Booster Seat’s Size

Choose the narrowest booster seats with the best safety and comfort features, if possible. After all, the narrower the booster seat, the more likely it is to fit three of them in your car.

Stick to as close to 17” (or slimmer) as possible.

Consider Your Child’s Age & Size

Different types of car seats are designed for children of varied ages or sizes.

You might prefer buying the slimmest convertible car seats that your newborn babies can use up to school age.

However, your child must be at least four years old to use a booster seat.

Aside from being at least four, your child must meet the booster seat’s minimum weight and height requirements. Be sure to check the booster manufacturer’s recommendations before purchasing.

Consider The Car Seats’ Arrangement

Some parents find it easier to arrange three different car seats with varied styles or configurations.

For example, combine a rear-facing infant seat with a front-facing convertible and a high back booster seat.

However, this combination doesn’t work for all families. Your best bet might be to purchase the slimmest, narrowest booster seats.

Considering The Brand Or Booster Seat Maker

UPPAbaby

UPPAbaby was founded in 2006 by Bob and Lauren Monahan following the birth of their second child. The Monahans explained that they built the company out of necessity because baby gear sold at the time were either impractical and ‘too complicated’ to operate or mass-produced and ‘cheaply made’. (12)

They launched the company with the initial goal of creating high-performance strollers to help make theirs and other parents’ lives better and easier. (12)

Today, the company has a wide range of products, including full-sized single and double strollers, lightweight umbrella strollers, bassinets, play yards, car seats (e.g., infant, convertible, and booster seats), and travel systems.

Some of their products are also GREENGUARD Gold Certified to ensure low chemical emissions to keep them safe for your little ones.

Nuna

Nuna is a global brand that began in 2007 with the launch of the ZAAZ™ high chair, it’s first product, in Amsterdam, the Netherlands. (13)

Today, the brand has expanded to include a range of baby gear, including strollers, car seats (e.g., infant, convertible, and booster seats), travel systems, baby carriers, travel cribs and play yards, and baby rockers.

Many of the brand’s products are GREENGUARD Gold Certified, including the flagship high chair. (14)

Graco

Graco is among the most highly recognizable names in the baby gear industry. It was founded as Graco Metal Products in Philadelphia, Pennsylvania, in 1942 by Russell Gray and Robert Cone. The company’s name is a combination of their last names. (3)

The brand produced its first product, the Swyngomatic (the world’s first automatic baby swing), in 1955. Although they targeted selling 10,000 units, the product sold millions, paving the way for the company to grow into one of the leading baby gear manufacturers in the US and worldwide. (3)

Today, Graco is a trusted brand that offers a wide range of products, including playards (e.g., the Pack ‘n Play), car seats, strollers, high chairs, bassinets, baby carriers, swings, and jumpers.

They also offer as many as 50+ car seats in different styles and designs.

Aside from the products reviewed above, the following are some of Graco’s narrowest booster seats:

Graco True3Fit LX 3-in-1 Convertible Car Seat (16.7” wide)
Graco SlimFit3 LX 3-in-1 Convertible Car Seat (16.7” wide)
Graco Affix Highback Booster Seat (16.75” wide)
Graco Tranzitions 3-in-1 Harness Booster (19” wide)
Graco SlimFit Convertible Car Seat (19″ wide)
Graco Milestone All-in-One Convertible Car Seat (19.7” wide)
Graco TurboBooster Highback Booster Car Seat (16.7” wide)

Chicco

Chicco (pronounced as “kee-ko”) is also a trusted brand with a strong presence in the US and worldwide, with a brand presence in at least 120 countries. It was founded in Italy in 1958 by Pietro Catelli, an inventor and developer of pharmaceutical devices. (4)

Catelli began developing baby products after his son’s birth. (4)

Today, Chicco is a trusted brand, offering a wide range of baby products such as car seats, strollers, playards, bassinets, baby carriers, and infant feeding (e.g., baby bottles) or soothing items (e.g., pacifiers).

The brand has around 50 car seats in varied styles and designs.

Some of their slimmest booster seats include the following, aside from the products reviewed above:

Get more information about the differences between these two leading brands in our Graco vs. Chicco review.

Britax

Founded in 1939 out of British Accessories (a company) in Europe, Britax is among the leading innovators in the child car seat industry. (5)

Over the years, Britax acquired several child seat manufacturers, including RÖMER in Germany and Safe-n-Sound in Australia. (5)

Britax Child Safety, Inc. was formally established in the US in 1996. (5)

The following year, the brand released the Roundabout, touted as the first convertible car seat in the US. They also became the first manufacturer to use ISOFIX (an anchoring system made before the LATCH).

In 2001, Britax launched the Super Elite, which is claimed to be the first child seat that lets children stay in a 5-point harness for up to 80 lbs. (5)

Britax also claims to be the first in the US to produce infant car seats that have “True Side Impact Protection” in 2003. This safety feature provides advanced side impact protection for children from their heads down to their hips. (5)

With the launch of the Advocate CS in 2009, the brand also claims to be the first worldwide to use Side Impact Cushion Technology. (5)

Today, Britax has around a dozen car seats, offering products for your baby’s every age and stage.

Aside from the boosters reviewed above, the following are products from the brand:

Peg Perego

Peg Perego was founded in Italy in 1949 when Giuseppe Perego’s son Lucio Perego was born. Lucio is now the brand’s president. (6)

The brand’s first product was a baby carriage that Giuseppe designed for his son. (6)

The company grew and designed more carriages and strollers before expanding to other baby gear such as car seats, high chairs, and ride-on toys. (6)

Peg Perego takes pride in producing their car seats, strollers, and high chairs in Italy, where the brand was founded. Though their ride-on toys are made in the US. (6)

Today, the brand offers around 10 car seats in varied styles and designs. Aside from those reviewed above, here’s another slim Peg Perego booster seat:

Peg Perego Primo Viaggio Shuttle Plus 120 2-in-1 Booster Car Seat (17.25” wide)

Diono

Diono was founded in Seattle, Washington, in 1999. The brand claims that the city inspired the “Diono difference” and remains their inspiration to drive their innovation. (7)

Today, Diono has around a dozen different car seats, including the following narrow booster seats:

Maxi-Cosi

Maxi-Cosi has been manufacturing car seats, strollers, and other baby products (e.g., bassinets, high chairs, rockers, play yards, and swings) for over 35 years. Today, it’s part of the Dorel Juvenile company, under Dorel Industries, Inc. (15)(16)

Acknowledging that every car seat is different, Maxi-Cosi offers free live video chat sessions with their licensed technicians to guide you through the installation process. (15)

The company also assures consumers that all their products, including the booster seats, exceed ASTM and governmental safety standards. (15)

Another narrow booster from the brand:

Maxi-Cosi Rodifix AirProtect Booster (19.49” wide)

Cosco

Cosco began as the Columbus Specialty Company in 1935 selling special tin matchboxes that automatically replace newly dispensed matches. The company changed its name to Cosco (COlumbus Specialty COmpany) in 1941, adding military equipment to their long list of products. (17)

The company became part of Dorel in 1988 and has since expanded to include a wide range of baby products, including car seats, strollers, play yards, high chairs, and bassinets. (17)

Another booster seat from the brand:

Cosco Rise Backless Booster Seat (16.25” wide)

Evenflo

Evenflo began as a company manufacturing baby feeding products in the 1920s in Ravenna, Ohio. Today, the brand sells a wide range of baby products and gear, including car seats, strollers, travel systems, high chairs, baby gates, and activity centers. (18)

Here’s another booster seat from the brand:

Evenflo GoTime LX Booster Car Seat (19.49” wide)

Other Buying Tips & Considerations For The Narrowest Booster Seats

Considering The Narrowest Car Seat Types: All-in-One Convertibles Vs. Booster Seats

All-in-One (3-in-1 Or 4-in-1) Car Seats

Pros:

They can be used by babies and older children.
You don’t need to change the car seats as your children grow or go through the process of choosing and installing a new one.
They can have a 5-point harness for smaller children.

Cons:

They might be pricier than booster seats.
They can be bulkier or wider than booster seats.
They might also be heavier.
Even if they can be used for babies, they aren’t compatible with strollers and can’t be used with a travel system.

Some examples of the narrowest all-in-one car seats:

You can also learn more about the best convertible car seats in our review.

High-Backed Booster Seats

Pros:

They can provide child protection starting at age four or their minimum weight and height requirements.
They’re likely to cost less than the all-in-one options.

Cons:

They don’t convert to backless booster seats.
You can’t use these for younger children.

Backless Booster Seats

Pros:

They’re ideal for much older children who are nearly ready to transition into using your vehicle’s seat belt only.
They’re usually less expensive than the other booster designs.

Cons:

They can provide less protection than the high back booster seats.

2-in-1 Booster Seats

Pros:

They convert to high back or backless booster seats.

Cons:

They can be more expensive than the individual high back or backless booster seats.
They’re less versatile than the all-in-one convertible child car seats.

The Slimmest Portable Travel Booster Seats

Easily portable booster seats for temporary use:

BubbleBum Inflatable Backless Booster (11” wide)

WAYB Pico Travel Booster (14.5” wide)

UberBoost Inflatable Booster (14.5” wide)

Stroller Compatibility

Most booster seats aren’t compatible with strollers, so this isn’t a major factor. Check for available adapters if you need a travel system (stroller + car seat).

FAQs & Important Tips To Remember That Save Lives

Are Booster Seats Smaller Or The Same Size As Traditional Car Seats?

Booster seats tend to be slimmer than traditional car seats because they’re designed for older children. These seats don’t have the thicker padding for added side impact protection designed for smaller kids.

Can I Put A Booster Seat In The Front Seat?

No. Kids should never be in the front seat because your car’s air bags are designed to protect adults, not children.

So, any car or booster seat shouldn’t be installed in the front seat.

Can I Put My Child’s Booster Seat In The Middle?

Yes. The middle spot in the back seat (or row of middle seats in a three-row vehicle) is ideal for your child’s booster seat. (8)

However, if this spot is uneven or doesn’t have a seat belt or anchor tethers, choose either side of the back seat.

Why Is It Safe To Put My Child’s Booster Seat In The Middle?

Front passenger air bags can actually injure or kill young children during a crash. (9)

The middle seat is also the ideal spot to place your child’s booster seat because experts consider it the safest seat position in most vehicles. (9)

Do I Need To Anchor My Child’s Booster Seat?

Yes. Your child’s booster seat must be anchored to your vehicle, either using your seat belt or the LATCH system (if your vehicle has it).

Many booster seats have LATCH connectors. It’s best to use them to secure the booster seat whether or not it’s being used.

What’s The Minimum Height For Using A Booster Seat?

Most manufacturers require that your child is at least 40 lbs or 38 inches tall before transitioning to a booster seat. (10)

Always check your booster seat’s minimum and maximum limits for your child’s safety.

What’s The Age Range For Backless Boosters?

Backless boosters are ideal for 8-year-olds and older children. (10)

Depending on your child’s height and weight, they might need a booster seat until they’re around 12 years old. (10)

They can stop using the booster seat when they’re big enough to use your vehicle’s lap and shoulder seat belts. They must also be tall enough to sit with their back against your vehicle’s seat back and have their knees bent over the seat’s edge without slouching. (11)

What To Do If I Can’t Get My Hand In To Buckle My Child’s Booster?

Pull your vehicle’s seat belt slowly, then let your child climb into the booster seat before releasing the belt. However, this might not work for certain booster seats with automatic lock systems.

If so, teach your child to buckle their seatbelt properly. However, be sure to double-check that the buckle is securely fastened and that your child knows they shouldn’t unbuckle it while your car is in motion.

Do Booster Seats Expire & Can I Still Use Them Beyond The Expiration Date?

Yes. Booster seats expire, though the dates can vary depending on the brand or product. Always check the expiry date of your child’s booster seats and take note of it so you can get a new one when necessary.

Don’t use booster seats beyond their expiration date because expired products might not provide your child ample protection in a crash.

Do Booster Seats Last Long?

Most booster seats can last around 8-10 years, but always double-check your product’s expiration dates.

Are There Disadvantages To Using Booster Seats?

Because of their design, booster seats might provide less protection to your child than traditional car seats.

Designed for older children, booster seats typically lack a 5-point harness (with straps that go over your child’s shoulders and hips, and are attached to the chest and groin area).

This type of harness provides added protection because it helps distribute force evenly towards your child’s hips and shoulders, reducing their risks of injury or death.

Other Types Of Slim Products: The Narrowest Infant Car Seats

Chicco KeyFit 30 Infant Car Seat (16.5” wide)

Clek Liing Infant Car Seat (16.9” wide)

UppaBaby Mesa V2 Car Seat (17” wide)

Nuna Pipa Infant Car Seat (17” wide)

Cybex Aton 2 Car Seat (17.3” wide)

References

(1) https://www.businesswire.com/news/home/20230308005900/en/Settlement-Administrator-Angeion-Group-announces-Proposed-Settlement-in-Chicco-%E2%80%9CKidFit%E2%80%9D-Booster-Seat-Class-Action

(2) https://www.nhtsa.gov/car-seat/EVENFLO/CHASE/a__1963163#recalls

(3) https://www.gracobaby.com/about-us.html

(4) https://www.chiccousa.com/about-our-brand/about-us.html

(5) https://us.britax.com/why-britax/history

(6) https://us.pegperego.com/store/pegus/en_US/history

(7) https://diono.com/our-story

(8) https://www.healthychildren.org/English/safety-prevention/on-the-go/Pages/Car-Safety-Seats-Information-for-Families.aspx

(9) https://www.cdc.gov/injury/features/child-passenger-safety/index.html

(10) https://www.healthychildren.org/English/safety-prevention/on-the-go/Pages/Booster-Seats-for-School-Aged-Children.aspx

(11) https://kidshealth.org/en/parents/auto-prek-bigkid.html

(12) https://uppababy.com/our-company/our-story/

(13) https://nunababy.ca/en/about-us/1112-we-are-nuna

(14) https://nunababy.com/usa/greenguard-gold-certified

(15) https://www.maxicosi.com/us-en/why-maxi-cosi

(16) https://www.maxicosi.com/us-en/about-dorel-juvenile

(17) https://www.coscoproducts.com/pages/about-us

(18) https://www.evenflo.com/pages/about-evenflo