# Narrow convertible car seats for a small back seat Which convertible car seat is narrow enough to fit a small back seat? Maxi\-Cosi Kani 4\-in\-1 Convertible Car Seat: The video says the seat has four modes and a slim design to help with three\-across fit\. Graco SlimFit 3\-in\-1 Narrow All\-in\-One: Rotating cup holders rotate away to make the seat about 10% slimmer\. Britax Galaxy360 Slim: The reviewer likes the 17\-inch narrow shell and the two cup holders, but warns that rotating seats generally cannot be used three\-across because the seat needs clearance on both sides to spin\. ### 1. [Maxi\-Cosi Kani 4\-in\-1 Convertible Car Seat](/products/ucp/albeebaby-com/9722098385127) (sold by albeebaby\.com) The video says the seat has four modes and a slim design to help with three\-across fit\. - Width: The video says the seat has four modes and a slim design to help with three\-across fit\. (review) - Modes and limits: The store listing gives mode weight and height limits: rear\-facing 5–40 lb and 19–40 in; forward\-facing 30–65 lb and 34\.4–49 in; belt\-positioning booster 40–100 lb and 43\.4–52 in; backless booster 40–100 lb and 43\.4–57 in\. (listing) ### 2. [Graco SlimFit 3\-in\-1 Narrow All\-in\-One](/products/ucp/albeebaby-com/9564451504359) (sold by albeebaby\.com) Rotating cup holders rotate away to make the seat about 10% slimmer\. - Width: Rotating cup holders rotate away to make the seat about 10% slimmer\. (listing) - Modes and limits: The seat is rear\-facing 5\-40 lb, forward\-facing 22\-65 lb, and belt\-positioning booster 30\-100 lb\. (listing) ### 3. [Britax Galaxy360 Slim](/products/ucp/albeebaby-com/9722083541223) (sold by albeebaby\.com) The reviewer likes the 17\-inch narrow shell and the two cup holders, but warns that rotating seats generally cannot be used three\-across because the seat needs clearance on both sides to spin\. - Width: The reviewer likes the 17\-inch narrow shell and the two cup holders, but warns that rotating seats generally cannot be used three\-across because the seat needs clearance on both sides to spin\. (review) - Modes and limits: Rear\-facing harnessed use is 5–50 lb, forward\-facing harnessed use is 30–65 lb, and standing height must be under 49 inches in both directions\. (listing) Every value in the table is a fact RoboTrunk checked, linked to the page it came from\. A dash means no checked fact fills that cell\. Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live\. Written 2026-10-12T04:35:08.365Z. This page is published by RoboTrunk, a store built for shopping agents. The store named on this page sells the product and ships it. RoboTrunk is not the seller and never holds the money. Buying works in one path. RoboTrunk's tools prepare a checkout at that store, then hand back a short-lived link. The person approves the total; once RoboTrunk has checked the store's total against it, the person is given the checkout link to tap in their own browser, or, if the person prefers and gives permission, their agent may open the link and finish there, and payment always happens on the store's own checkout page. RoboTrunk never takes the payment or sees a card. Where the rest of this site is: - /agent/story.md is what RoboTrunk is and how it works, in full. - /agent/tools.json is every tool, its arguments and its answers. - /agent/merchants is every store you can buy from through RoboTrunk. - /products/ucp is every store's indexed products. - /products/search is one search across every store, in plain words. - [What RoboTrunk is](/agent/story.md) - [Every tool, in your browser through WebMCP](/agent) - [The tools and how to call them](/agent/tools.json) - [The stores you can buy from](/agent/merchants) - [Every store's products](/products/ucp) - [Search every store at once](/products/search)