Best Narrow Booster

Graco® TurboBooster® LX Backless Booster with Affix Latch | Backless Booster Seat for Big Kids Transitioning to Vehicle Seat Belt (Rio)

Graco TurboBooster 2.0 Highback Booster Car Seat, Declan

Chicco KidFit® ClearTex® Plus 2-in-1 Belt-Positioning Booster Car Seat, Backless and High Back Booster Seat, for Children Aged 4 Years and up and 40-100 lbs. | Reef/Navy

Safety 1st Grand 2-in-1 Booster Car Seat, Forward Facing Car Seat with Harness, High Back Booster Seat for Car, 30-65 Pounds and Belt-Positioning Booster, Car Seats, 40-100 Pounds, High Street

Britax Highpoint Backless Belt-Positioning Booster Seat, SafeWash Gray Ombre

Britax Skyline 2-Stage Belt-Positioning Booster Car Seat, Dusk - Highback and Backless Seat

Peg Perego Viaggio Flex 120 - Booster Car Seat - for Children from 40 to 120 lbs - Made in Italy - Licorice (Black)

Chicco GoFit Plus Backless Booster Car Seat with LATCH Attachment and Quick-Release LATCH Removal, Portable Travel Booster Seat for children 40-110 lbs. | Iron/Black

Mifold Kids High Back Booster Car Seat with Strap – Adjustable Foldable Big Kid Car Seat for Travel – Slate Grey

UPPAbaby Alta V2 High Back Booster Seat/Seven-Position, Active Support Headrest for Growing Children/SecureFit Integrated Belt Guide + Positioner/Cup Holder Included/Kavneer (Almond Mélange)