| Model | Width (in) | Depth (in) | Height (in) | Weight & Height Limits | Harness Type | FAA Approved | Price (USD) | | -------------------------------------------------------------------------------------------------------------- | ---------- | ---------- | ----------- | --------------------------------------------------------------------------------------------------- | --------------------------- | ------------ | ----------- | | [Diono Radian 3R](https://www.amazon.com/dp/B083F5P7VP) | 17 | 28.4 | 16.9 | **RF**: 5-50 lbs, up to 44"**FF**: 22-65 lbs, up to 57"**Booster**: 40-120 lbs, up to 57" | 5-Point | Yes | $200 | | [Graco SlimFit3 LX 3-in-1](https://a.co/d/4vhSOjR) | 16.7 | ~26 | ~28 | **RF**: 5-40 lbs, up to 49"**FF**: 22-65 lbs, up to 49"**Booster**: 40-100 lbs, 43-57" | 5-Point | Yes | $200 | | [Evenflo Revolve360 Slim](https://www.evenflo.com/products/revolve360-slim-2-in-1.html) | 16.7 | 19.8 | N/A | **RF**: Up to 50 lbs**FF**: Up to 65 lbs, up to 49" | 5-Point | Yes | $220 | | [Safety 1st EverSlim 4-in-1](https://safety1st.com/products/everslim-4-mode-4-in-1-convertible-car-seat-cc343) | 16.7 | 25-28.5 | N/A | **RF**: 5-40 lbs, 19-40"**FF**: 22-65 lbs, 29-49"**Booster**: 40-100 lbs, 43-52" | 5-Point & Belt-Positioning | Yes | $150 | | [Graco Tranzitions 3-in-1](https://www.amazon.com/dp/B01N3MYVZM) | 19 | 17.4 | N/A | **FF**: 22-65 lbs**Booster**: Up to 100 lbs, 57" | 5-Point & Belt-Positioning | Yes | $120 | | [Chicco KidFit Adapt Plus](https://www.amazon.com/dp/B0916B78LN) | 17 | 17 | N/A | **Booster**: Up to 110 lbs, 57" | Seatbelt (Belt-Positioning) | No | $100 | | [Graco Extend2Fit](https://www.amazon.com/dp/B019EGMGR0) | 19.5 | 21.5 | N/A | **RF**: 5-50 lbs, up to 49"**FF**: Up to 65 lbs, up to 49" | 5-Point | Yes | $180 | | [Britax Grow With You](https://www.amazon.com/dp/B083FXQK1W) | 19 | 21 | N/A | **FF**: 25-65 lbs**Booster**: 40-120 lbs, up to 63" | 5-Point & Belt-Positioning | No | $300 | | [Britax Poplar](https://us.britax.com/shop/car-seats/poplar-convertible-car-seat) | 17 | 20.5 | 23.5 | **RF**: 5-50 lbs, up to 49"**FF**: 22-65 lbs, 28-49" | 5-Point | Yes | $250 | | [Evenflo GoTime LX](https://www.amazon.com/dp/B07T9LPDR3) | 17 | 15 | N/A | **Booster**: Up to 120 lbs, 57" | Seatbelt (Belt-Positioning) | No | $80 | | [Cosco Scenera NEXT](https://coscokids.com/products/scenera-next-convertible-car-seat-cc123) | 17 | 23 | N/A | **RF**: 5-40 lbs, 19-40"**FF**: 22-40 lbs, 29-43" | 5-Point | Yes | $50 | | [Baby Trend Trooper](https://babytrend.com/pages/car-seats) | 17.5 | ~30 | N/A | **RF**: 4-40 lbs, head 1" below shell**FF**: 23-65 lbs, up to 50" | 5-Point | Yes | $130 | | [Clek Foonf](https://clekinc.com/products/foonf) | 17 | 32 | ~27 | **RF**: 14-50 lbs, 25-43"**FF**: 20-65 lbs, 30-49" | 5-Point | Yes | $500 | | [Century Drive On 3-in-1](https://csftl.org/century-drive-on-multimode-car-seat-review) | 19 | ~25 | N/A | **RF**: 5-40 lbs, head 1" below headrest**FF**: 22-65 lbs, up to 49"**Booster**: 40-100 lbs, 43-57" | 5-Point | Yes | $110 | | [WAYB Pico Travel](https://www.wayb.com/products/pico) | 14.5 | 11.6 | N/A | **FF**: Up to 50 lbs, up to 45" | 5-Point | Yes | $330 |