Best Narrow Booster

Safety 1st Grow and Go Extend 'N Ride All-in-One Convertible Car Seat Mineshaft

Diono Radian 3R, 3-in-1 Convertible Car Seat, Rear & Forward Facing, 10 Years 1 Car Seat, Slim Design Fits 3 Across, Blue Sky

Diono Cambria 2 XL 2022, Dual Latch Connectors, 2-in-1 Belt Positioning Booster Seat, High-Back to Backless Booster with Space and Room to Grow, 8 Years 1 Booster Seat, Pink

Graco Turbobooster Highback Booster Seat, 2-in-1 Car Seat, Highback to Backless Booster, Lennon

Diono Everett NXT High Back Booster Car Seat, Lightweight Slim Fit Design, 8 Years 1 Booster Seat, Black

Diono Monterey 2XT Latch 2 in 1 High Back Booster Car Seat with Expandable Height & Width, Side Impact Protection, 8 Years 1 Booster, Blue

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

Diono Monterey 5iST FixSafe High Back Booster Car Seat with Expandable Height And Width, Compact Fold To Full Size Booster, Foldable, Portable Booster For Go-Anywhere Travel, Gray Slate

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

Maxi-Cosi RodiSport 2-in-1 Booster Car Seat, High-back and backless modes, Rigid UAS Latch, cupholder Midnight Black