Best Most Narrow Booster Seat

Jovikids I-Size Booster Seat for Car with ISOFIX, 125-150cm (Group 2/3, 3-12 Years), Portable Booster Seat for Kids, Comfortable, Compact, Convenient for Everyday Use, Great for Travel, ECE R129, Blue

Graco Junior Maxi i-Size R129 Highback Booster car seat with cupholders, Suitable from 100-150cm (approx. 3.5 to 12 years), Midnight fashion

Bubblebum Inflatable Booster Car Seat - Travel Booster Seat - Portable Car Booster Seat - Booster Seat for Car - Narrow Slim Foldable Car Seat Booster - Perfect for Kids 4-11yrs Old - Twin Black

My Child Brundle Group 2/3 Booster, Grey, 700 g

BRITAX RÖMER car seat KIDFIX 2 Z LINE, from 4 to 12 Years Old Children, ISOFIX Car Seat, Child from 15 to 36kg (Group 2/3), Space Black

Graco Booster Basic R129 Backless Booster Car Seat, Lightweight at only 1.4kg, Suitable from approx. 7 to 12 years (135-150cm), Black fashion

Cozy N Safe Neo 125-150cm i-Size Child Booster Seat, 22-36KG, Approx. 6-12 Years Old, Forward Facing, Removable Covers, Deep Foam Padded seat and armrests, 3-Point Seatbelt, ECE R129

Graco Booster Max R129 ISOFIX backless booster seat, Lightweight at only 2.7kg, Suitable from 137-150cm (approx. 7 to 12 years), Midnight fashion

All Ride Booster Seat Grey

Nania - Belted booster seat ALPHA 126-150 cm R129 i-Size - for Children aged 8 to 12 - Made in France - with armrests (Access black)