# Slim convertible car seats for a small back seat

Which slim convertible car seats fit well in a small back seat?

Graco SlimFit3 LX: The seat is about 16\.7 inches wide at the shoulders, with a base about 11\.5 inches wide, making it one of the narrowest convertible seats tested\. Graco confirmed that three SlimFit3 LX seats fit three\-across in a 2019\-2021 Toyota RAV4 in several configurations, including all forward\-facing, all rear\-facing, and mixed modes\. Graco SlimFit 3\-in\-1 Narrow All\-in\-One Convertible Car Seat \- Sydney: The rotating cupholders can be turned to reduce the seat's width\. Evenflo All4Stages Slim Plus Canopy 4\-in\-1 Convertible Car Seat: The seat is 16\.9 in\. wide, which the maker says saves space for other backseat passengers and can allow three car seats across the back seat\. Evenflo All4Stages Slim 4\-in\-1 Convertible Car Seat: 16\.9 in\. Evenflo Revolve360 Slim 2\-in\-1 Rotating Car Seat with Quick Clean Cover: The seat's exterior was slimmed to a 16\.7\-inch footprint while keeping the child's seating space and safety\. Testers could never get a stable LATCH install across several cars; the LATCH strap's plastic release buckle collides with the plastic bevel on the base and stops the strap being tightened enough to remove sideways movement\.

### 1. [Graco SlimFit3 LX](/products/ucp/albeebaby-com/9685796585703) (sold by albeebaby\.com)

At 16\.7 inches wide, the reviewer calls it one of the narrowest convertible car seats and says if it does not fit a tight setup, likely nothing else will\.

- Width: The seat is about 16\.7 inches wide at the shoulders, with a base about 11\.5 inches wide, making it one of the narrowest convertible seats tested\. (review) <https://csftl.org/graco-slimfit3-lx-review/>
- Three\-across fit: Graco confirmed that three SlimFit3 LX seats fit three\-across in a 2019\-2021 Toyota RAV4 in several configurations, including all forward\-facing, all rear\-facing, and mixed modes\. (blog) <https://carseatblog.com/53035/narrow-car-seat-for-2019-21-toyota-rav4-hybrid-prime-graco-slimfit3-lx/>
- Setup: -

### 2. [Graco SlimFit 3\-in\-1 Narrow All\-in\-One Convertible Car Seat \- Sydney](/products/ucp/albeebaby-com/9564479750375) (sold by albeebaby\.com)

The rotating cupholders can be turned to reduce the seat's width\.

- Width: -
- Three\-across fit: -
- Setup: No assembly is needed\. (review) <https://www.youtube.com/watch?v=fbtzCXbEZpQ>

### 3. [Evenflo All4Stages Slim Plus Canopy 4\-in\-1 Convertible Car Seat](/products/ucp/evenflo-com/9190434668700) (sold by evenflo\.com)

The seat is 16\.9 in\. wide, which the maker says saves space for other backseat passengers and can allow three car seats across the back seat\.

- Width: Assembled the seat measures 16\.9 in\. wide, 22 in\. deep and 24\.3 in\. high\. (guide) <https://evenflobaby.myshopify.com/products/all4stages-slim-plus-canopy-4-in-1-convertible-car-seat>
- Three\-across fit: The seat is 16\.9 in\. wide, which the maker says saves space for other backseat passengers and can allow three car seats across the back seat\. (listing) <https://evenflobaby.myshopify.com/products.json>
- Setup: The seat arrives fully assembled and only needs to be adjusted to the child's stage, so setup felt like an adjustment rather than a build\. (blog) <https://www.thebabyverse.org/evenflo-all4stages-slim-plus-canopy-4-in-1-convertible-car-seat-review-the-one-seat-to-rule-them-all/>

### 4. [Evenflo All4Stages Slim 4\-in\-1 Convertible Car Seat](/products/ucp/evenflo-com/8602499711132) (sold by evenflo\.com)

16\.9 in\.

- Width: 16\.9 in\. (listing) <https://evenflobaby.myshopify.com/products.json>
- Three\-across fit: -
- Setup: -

### 5. [Evenflo Revolve360 Slim 2\-in\-1 Rotating Car Seat with Quick Clean Cover](/products/ucp/evenflo-com/8376175689884) (sold by evenflo\.com)

The seat's exterior was slimmed to a 16\.7\-inch footprint while keeping the child's seating space and safety\.

Recall notice: US National Highway Traffic Safety Administration \(NHTSA\), 2025\-09\-25: [NHTSA Recall 25C010 \- Evenflo Company, Inc\. \- child seat: EVENFLO](https://www.nhtsa.gov/recalls?nhtsaId=25C010) (recall). The notice may cover only some serial numbers or dates of manufacture, which this listing does not show\. [What a match means](/recall-radar).

- Width: The seat's exterior was slimmed to a 16\.7\-inch footprint while keeping the child's seating space and safety\. (listing) <https://evenflobaby.myshopify.com/products.json>
- Three\-across fit: -
- Setup: Testers could never get a stable LATCH install across several cars; the LATCH strap's plastic release buckle collides with the plastic bevel on the base and stops the strap being tightened enough to remove sideways movement\. (review) <https://www.babygearlab.com/reviews/vehicle-safety/convertible-car-seat/evenflo-revolve360-slim-2-in-1>

## Also cited in the text

- Graco SlimFit3 LX, narrowness: At 16\.7 inches wide, the reviewer calls it one of the narrowest convertible car seats and says if it does not fit a tight setup, likely nothing else will\. (blog) <https://www.thecarmom.com/articles/graco-slimfit3-lx-3-review>
- Graco SlimFit 3\-in\-1 Narrow All\-in\-One Convertible Car Seat \- Sydney, space: The rotating cupholders can be turned to reduce the seat's width\. (review) <https://www.youtube.com/watch?v=dhAGn9NhhNY>

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Written 2026-10-21T01:41:18.170Z.

## Recall notices

About the recall notices above: each matches a model named in a regulator's notice, as the index stood on 2026\-09\-25\. This listing is the brand and model a regulator's notice names\. Two AI models judged it so independently\. It does not mean the unit on sale is from an affected batch, that the store knew, or that the product is illegal where the store sells it; a US recall does not bind an Australian store\. The notice may cover only some serial numbers or dates of manufacture, which a listing does not show\. RoboTrunk never limits or blocks a purchase over a notice; read the notice and decide\.

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