Narrow backless booster seats for a small back seat
Which backless booster seats are narrow enough to fit a small back seat?
Britax UpNGo Click Backless Booster Car Seat: The seat is 17.1 inches wide and is designed to fit three across in most vehicles, but Britax will not guarantee 3-across fitment in every vehicle. The maker lists rigid LATCH click-in, a 17.1-inch slim SpaceSaver design, the PosturePlus contoured seat, a carry weight under 5 lb, two dishwasher-safe cup holders, a washer-and-dryer-friendly cover, naturally flame-retardant fabrics with no added FR chemicals, colour-coded belt guides and a shoulder belt guide. Britax UpNGo: Assembled dimensions are 15.5 inches long, 17.1 inches wide and 9 inches high. The seat is 17.1 inches wide (SpaceSaver design), intended to leave room for siblings or carpoolers. Maxi-Cosi RodiFix Booster Car Seat: Measured by the reviewers: 13.5 lb, 18.5 in. wide at the back in the narrow setting and 21 in. in the widest, 17 in. across the front of the base, 12 in. at the lap belt path, 10 in. inside at the hips and 16 in. at the knees, 12 in. seat pan depth, and shoulder belt guide heights from 14 in. to 22 in.
| Product | Why | Width | Three across | Child limits |
|---|---|---|---|---|
| 1. Britax UpNGo Click Backless Booster Car Seat sold by strolleria.com | The seat is 17.1 inches wide and is designed to fit three across in most vehicles, but Britax will not guarantee 3-across fitment in every vehicle. | The maker lists rigid LATCH click-in, a 17.1-inch slim SpaceSaver design, the PosturePlus contoured seat, a carry weight under 5 lb, two dishwasher-safe cup holders, a washer-and-dryer-friendly cover, naturally flame-retardant fabrics with no added FR chemicals, colour-coded belt guides and a shoulder belt guide. guide | The seat is 17.1 inches wide and is designed to fit three across in most vehicles, but Britax will not guarantee 3-across fitment in every vehicle. listing | The UpNGo Click is designed for children from 40 to 120 lb and 46 to 63 inches tall. listing |
| 2. Britax UpNGo sold by strolleria.com | The seat is 17.1 inches wide (SpaceSaver design), intended to leave room for siblings or carpoolers. | Assembled dimensions are 15.5 inches long, 17.1 inches wide and 9 inches high. guide | The seat is 17.1 inches wide (SpaceSaver design), intended to leave room for siblings or carpoolers. guide | The maker designs this booster for children weighing 40 to 120 lbs and measuring 46 to 63 inches tall. guide |
| 3. Maxi-Cosi RodiFix Booster Car Seat sold by megababiesusa.com | Measured by the reviewers: 13.5 lb, 18.5 in. wide at the back in the narrow setting and 21 in. in the widest, 17 in. across the front of the base, 12 in. at the lap belt path, 10 in. inside at the hips and 16 in. at the knees, 12 in. seat pan depth, and shoulder belt guide heights from 14 in. to 22 in. | Measured by the reviewers: 13.5 lb, 18.5 in. wide at the back in the narrow setting and 21 in. in the widest, 17 in. across the front of the base, 12 in. at the lap belt path, 10 in. inside at the hips and 16 in. at the knees, 12 in. seat pan depth, and shoulder belt guide heights from 14 in. to 22 in. review | - | The store's listing describes a belt-positioning booster for children from 40 lb to 120 lb and 40 in. to 57 in. tall, while other sources give a minimum height of 43 in. (NHTSA and Consumer Reports say 43-57 in., and the manual's use section also says 43-57 in.), so the sources disagree on the minimum height. listing |
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Written 2026-10-25T01:55:25.037Z.
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