{
  "schema_version": "compare-page.v2",
  "page_id": "car-seats-that-fit-three-across-in-one-back-seat-b10b15d9",
  "url": "https://robotrunk.com/compare/want/car-seats-that-fit-three-across-in-one-back-seat-b10b15d9",
  "title": "Car seats that fit three across in one back seat",
  "question": "Which car seats fit three across in a single back seat?",
  "answer": "Diono Connect3 RXT Backless Booster: The slim design fits three across. The seat is slim-fit and measures less than 17 inches wide.\nWAYB Pico: At under 15 inches wide it is one of the narrowest seats available, which is what makes three-across possible.\nBritax One4Life Slim: Shown fitting three across beside a Britax Poplar convertible and a Willow S infant seat; with the cup holders fitted it is wider than the bare 17.5 in width.\nClek Fllo: The Fllo was described as the narrower, lighter alternative to the Foonf, at 25 lb, easier to move and install, and suited to three-across in mid-size sedans. Although narrow, the seat is long rear-facing and may require the front passenger seat to move far forward; it may not suit compact cars.\nMaxi-Cosi Kani 4-in-1 Convertible Car Seat: The three-across fit is not guaranteed and depends on the vehicle model.",
  "kind": "car seat",
  "market": "US",
  "generated_at": "2026-10-31T06:58:48.083Z",
  "columns": [
    "Width",
    "Three-across evidence",
    "Setup caveat",
    "Limits"
  ],
  "notices": {
    "facts": "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.",
    "price": "Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live."
  },
  "cited_facts": [
    {
      "ref": "p1.f1",
      "product": "Clek Fllo",
      "field": "vehicle fit",
      "value": "Although narrow, the seat is long rear-facing and may require the front passenger seat to move far forward; it may not suit compact cars.",
      "stated_as": "Although narrow, the seat is long rear-facing and may require the front passenger seat to move far forward; it may not suit compact cars.",
      "source_type": "review",
      "source_url": "https://bestcarseathub.com/reviews/clek-fllo/",
      "source_read_at": "2026-10-21T17:23:35.957Z"
    },
    {
      "ref": "p1.f2",
      "product": "Clek Fllo",
      "field": "positioning",
      "value": "The Fllo was described as the narrower, lighter alternative to the Foonf, at 25 lb, easier to move and install, and suited to three-across in mid-size sedans.",
      "stated_as": "The Fllo was described as the narrower, lighter alternative to the Foonf, at 25 lb, easier to move and install, and suited to three-across in mid-size sedans.",
      "source_type": "blog",
      "source_url": "https://teachtoddler.com/blog/clek-car-seat-review",
      "source_read_at": "2026-10-21T17:23:38.058Z"
    },
    {
      "ref": "p1.f4",
      "product": "Clek Fllo",
      "field": "dimensions",
      "value": "The seat measures 27 in high x 16.9 in wide x 12.5 in deep rear-facing, and 31 in high x 16.9 in wide x 12.5 in deep forward-facing.",
      "stated_as": "Car seat dimensions: 27\" H x 16.9\" W x 12.5\" D (rear-facing mode); 31\" H x 16.9\" W x 12.5\" D (forward-facing mode)",
      "source_type": "guide",
      "source_url": "https://modern-nursery-test-store.myshopify.com/products/clek-fllo-compact-convertible-car-seat",
      "source_read_at": "2026-10-21T17:21:35.144Z"
    },
    {
      "ref": "p3.f6",
      "product": "Diono Connect3 RXT Backless Booster",
      "field": "Width",
      "value": "The seat is slim-fit and measures less than 17 inches wide.",
      "stated_as": "measures less than 17\" wide",
      "source_type": "listing",
      "source_url": "https://kid-gear.myshopify.com/products.json",
      "source_read_at": "2026-10-21T19:03:09.838Z"
    },
    {
      "ref": "p3.f7",
      "product": "Diono Connect3 RXT Backless Booster",
      "field": "Three-across fit",
      "value": "The slim design fits three across.",
      "stated_as": "fitting three across without compromising interior space",
      "source_type": "listing",
      "source_url": "https://kid-gear.myshopify.com/products.json",
      "source_read_at": "2026-10-21T19:03:09.838Z"
    },
    {
      "ref": "p3.f8",
      "product": "Diono Connect3 RXT Backless Booster",
      "field": "Child weight range",
      "value": "Suitable for children weighing 40-120 lbs.",
      "stated_as": "Suitable for children weighing 40-120 lbs.",
      "source_type": "listing",
      "source_url": "https://kid-gear.myshopify.com/products.json",
      "source_read_at": "2026-10-21T19:03:09.838Z"
    },
    {
      "ref": "p6.f4",
      "product": "Britax One4Life Slim",
      "field": "three across demo",
      "value": "Shown fitting three across beside a Britax Poplar convertible and a Willow S infant seat; with the cup holders fitted it is wider than the bare 17.5 in width.",
      "stated_as": "Shown fitting three across beside a Britax Poplar convertible and a Willow S infant seat; with the cup holders fitted it is wider than the bare 17.5 in width.",
      "source_type": "review",
      "source_url": "https://www.youtube.com/watch?v=i9FgRSfAXvA",
      "source_read_at": "2026-10-21T13:38:33.679Z"
    },
    {
      "ref": "p6.f5",
      "product": "Britax One4Life Slim",
      "field": "dimensions",
      "value": "Listed dimensions are 18.5 in long, 17.5 in wide and 24.5 in high.",
      "stated_as": "Dimensions: Product Height 18.5\"L x 17.5\"W x 24.5\"H",
      "source_type": "guide",
      "source_url": "https://modern-nursery-test-store.myshopify.com/products/britax-one4life-slim-all-in-one-car-seat",
      "source_read_at": "2026-10-21T13:36:40.243Z"
    },
    {
      "ref": "p6.f9",
      "product": "Britax One4Life Slim",
      "field": "overhang",
      "value": "In harness mode the base may hang over the front edge of the vehicle seat by up to 3 in, but no overhang at all is allowed in booster mode.",
      "stated_as": "In harness mode the base may hang over the front edge of the vehicle seat by up to 3 in, but no overhang at all is allowed in booster mode.",
      "source_type": "blog",
      "source_url": "https://www.thecarseatpros.com/blog/one4lifeslimreview",
      "source_read_at": "2026-10-21T13:36:53.424Z"
    },
    {
      "ref": "p7.f1",
      "product": "Maxi-Cosi Kani 4-in-1 Convertible Car Seat",
      "field": "fit warning",
      "value": "The maker warns that actual fit may vary and not all children will comfortably fit the full weight and height ranges.",
      "stated_as": "Actual fit may vary. Not all children will comfortably fit in the car seat for the full weight and height ranges listed.",
      "source_type": "listing",
      "source_url": "https://modern-nursery-test-store.myshopify.com/products.json",
      "source_read_at": "2026-10-21T19:31:31.510Z"
    },
    {
      "ref": "p7.f2",
      "product": "Maxi-Cosi Kani 4-in-1 Convertible Car Seat",
      "field": "height and weight limits from retailer",
      "value": "The retailer listing gives rear-facing 5–40 lb and 19–40 in, forward-facing 30–65 lb and 34.4–49 in, high-back booster 40–100 lb and 43.4–52 in, and backless booster 40–100 lb and 43.4–57 in; the maker's page instead gives forward-facing as 22–65 lb, so the sources disagree on the forward-facing lower limit.",
      "stated_as": "Rear-facing car seat (5–40 lbs., 19\"–40\")\nForward-facing car seat (30–65 lbs., 34.4\"–49\")\nBelt-positioning high back booster seat (40–100 lbs., 43.4\"–52\")\nBackless booster seat (40–100 lbs., 43.4\"–57\")",
      "source_type": "guide",
      "source_url": "https://modern-nursery-test-store.myshopify.com/products/maxi-cosi-kani-4-in-1-convertible-car-seat",
      "source_read_at": "2026-10-22T01:32:42.753Z"
    },
    {
      "ref": "p7.f7",
      "product": "Maxi-Cosi Kani 4-in-1 Convertible Car Seat",
      "field": "dimensions and seat weight",
      "value": "Maximum dimensions are 30.25 in high by 19 in wide by 29 in deep; minimum dimensions are 19.25 in high by 19 in wide by 23.25 in deep; the seat weighs 23.2 lb.",
      "stated_as": "Dimensions: (Max) 30.25\"H x 19\"W x 29”D, (Min)19.25\"H x 19\"W x 23.25\"D\nWeight: 23.2 lbs",
      "source_type": "guide",
      "source_url": "https://modern-nursery-test-store.myshopify.com/products/maxi-cosi-kani-4-in-1-convertible-car-seat",
      "source_read_at": "2026-10-22T01:32:42.753Z"
    },
    {
      "ref": "p7.f12",
      "product": "Maxi-Cosi Kani 4-in-1 Convertible Car Seat",
      "field": "fit caveat",
      "value": "The three-across fit is not guaranteed and depends on the vehicle model.",
      "stated_as": "Car seat design fits 3 carseats across most large vehicle back seats (Actual fit may vary depending on the model of the vehicle.)",
      "source_type": "guide",
      "source_url": "https://modern-nursery-test-store.myshopify.com/products/maxi-cosi-kani-4-in-1-convertible-car-seat",
      "source_read_at": "2026-10-22T01:32:42.753Z"
    },
    {
      "ref": "p8.f5",
      "product": "WAYB Pico",
      "field": "width",
      "value": "At under 15 inches wide it is one of the narrowest seats available, which is what makes three-across possible.",
      "stated_as": "At under 15 inches wide it is one of the narrowest seats available, which is what makes three-across possible.",
      "source_type": "review",
      "source_url": "https://www.safeintheseat.com/seats/wayb-pico-car-seat-review-us-e29f6",
      "source_read_at": "2026-10-22T22:05:09.793Z"
    },
    {
      "ref": "p8.f8",
      "product": "WAYB Pico",
      "field": "dimensions",
      "value": "In use the seat measures 15.2 in long by 14.5 in wide; it is 22.8 in high with the headrest low and 27.8 in at its highest, and folds to 11.6 x 14.5 x 18.9 in.",
      "stated_as": "Car seat dimensions: 15.2\" L x 14.5\" W x 22.8\" H (27.8\" at highest position); 11.6\" L x 14.5\" W x 18.9\" H (storage position)",
      "source_type": "guide",
      "source_url": "https://modern-nursery-test-store.myshopify.com/products/wayb-pico-car-seat",
      "source_read_at": "2026-10-22T22:03:42.481Z"
    }
  ],
  "rows": [
    {
      "rank": 1,
      "merchant": {
        "slug": "goodbuygear-com",
        "display_name": "goodbuygear.com"
      },
      "product_id": "gid://shopify/Product/7641940131943",
      "name": "Diono Connect3 RXT Backless Booster",
      "url": "/products/ucp/goodbuygear-com/7641940131943",
      "why": "The slim design fits three across.",
      "cells": [
        {
          "column": "Width",
          "fact": {
            "field": "Width",
            "value": "The seat is slim-fit and measures less than 17 inches wide.",
            "stated_as": "measures less than 17\" wide",
            "source_type": "listing",
            "source_url": "https://kid-gear.myshopify.com/products.json",
            "source_read_at": "2026-10-21T19:03:09.838Z"
          }
        },
        {
          "column": "Three-across evidence",
          "fact": {
            "field": "Three-across fit",
            "value": "The slim design fits three across.",
            "stated_as": "fitting three across without compromising interior space",
            "source_type": "listing",
            "source_url": "https://kid-gear.myshopify.com/products.json",
            "source_read_at": "2026-10-21T19:03:09.838Z"
          }
        },
        {
          "column": "Setup caveat",
          "fact": null
        },
        {
          "column": "Limits",
          "fact": {
            "field": "Child weight range",
            "value": "Suitable for children weighing 40-120 lbs.",
            "stated_as": "Suitable for children weighing 40-120 lbs.",
            "source_type": "listing",
            "source_url": "https://kid-gear.myshopify.com/products.json",
            "source_read_at": "2026-10-21T19:03:09.838Z"
          }
        }
      ]
    },
    {
      "rank": 2,
      "merchant": {
        "slug": "modernnursery-com",
        "display_name": "modernnursery.com"
      },
      "product_id": "gid://shopify/Product/4799011061860",
      "name": "WAYB Pico",
      "url": "/products/ucp/modernnursery-com/4799011061860",
      "why": "At under 15 inches wide it is one of the narrowest seats available, which is what makes three-across possible.",
      "cells": [
        {
          "column": "Width",
          "fact": {
            "field": "dimensions",
            "value": "In use the seat measures 15.2 in long by 14.5 in wide; it is 22.8 in high with the headrest low and 27.8 in at its highest, and folds to 11.6 x 14.5 x 18.9 in.",
            "stated_as": "Car seat dimensions: 15.2\" L x 14.5\" W x 22.8\" H (27.8\" at highest position); 11.6\" L x 14.5\" W x 18.9\" H (storage position)",
            "source_type": "guide",
            "source_url": "https://modern-nursery-test-store.myshopify.com/products/wayb-pico-car-seat",
            "source_read_at": "2026-10-22T22:03:42.481Z"
          }
        },
        {
          "column": "Three-across evidence",
          "fact": {
            "field": "width",
            "value": "At under 15 inches wide it is one of the narrowest seats available, which is what makes three-across possible.",
            "stated_as": "At under 15 inches wide it is one of the narrowest seats available, which is what makes three-across possible.",
            "source_type": "review",
            "source_url": "https://www.safeintheseat.com/seats/wayb-pico-car-seat-review-us-e29f6",
            "source_read_at": "2026-10-22T22:05:09.793Z"
          }
        },
        {
          "column": "Setup caveat",
          "fact": null
        },
        {
          "column": "Limits",
          "fact": null
        }
      ]
    },
    {
      "rank": 3,
      "merchant": {
        "slug": "modernnursery-com",
        "display_name": "modernnursery.com"
      },
      "product_id": "gid://shopify/Product/14905665585518",
      "name": "Britax One4Life Slim",
      "url": "/products/ucp/modernnursery-com/14905665585518",
      "why": "Shown fitting three across beside a Britax Poplar convertible and a Willow S infant seat; with the cup holders fitted it is wider than the bare 17.5 in width.",
      "cells": [
        {
          "column": "Width",
          "fact": {
            "field": "dimensions",
            "value": "Listed dimensions are 18.5 in long, 17.5 in wide and 24.5 in high.",
            "stated_as": "Dimensions: Product Height 18.5\"L x 17.5\"W x 24.5\"H",
            "source_type": "guide",
            "source_url": "https://modern-nursery-test-store.myshopify.com/products/britax-one4life-slim-all-in-one-car-seat",
            "source_read_at": "2026-10-21T13:36:40.243Z"
          }
        },
        {
          "column": "Three-across evidence",
          "fact": {
            "field": "three across demo",
            "value": "Shown fitting three across beside a Britax Poplar convertible and a Willow S infant seat; with the cup holders fitted it is wider than the bare 17.5 in width.",
            "stated_as": "Shown fitting three across beside a Britax Poplar convertible and a Willow S infant seat; with the cup holders fitted it is wider than the bare 17.5 in width.",
            "source_type": "review",
            "source_url": "https://www.youtube.com/watch?v=i9FgRSfAXvA",
            "source_read_at": "2026-10-21T13:38:33.679Z"
          }
        },
        {
          "column": "Setup caveat",
          "fact": {
            "field": "overhang",
            "value": "In harness mode the base may hang over the front edge of the vehicle seat by up to 3 in, but no overhang at all is allowed in booster mode.",
            "stated_as": "In harness mode the base may hang over the front edge of the vehicle seat by up to 3 in, but no overhang at all is allowed in booster mode.",
            "source_type": "blog",
            "source_url": "https://www.thecarseatpros.com/blog/one4lifeslimreview",
            "source_read_at": "2026-10-21T13:36:53.424Z"
          }
        },
        {
          "column": "Limits",
          "fact": null
        }
      ]
    },
    {
      "rank": 4,
      "merchant": {
        "slug": "modernnursery-com",
        "display_name": "modernnursery.com"
      },
      "product_id": "gid://shopify/Product/4799010701412",
      "name": "Clek Fllo",
      "url": "/products/ucp/modernnursery-com/4799010701412",
      "why": "The Fllo was described as the narrower, lighter alternative to the Foonf, at 25 lb, easier to move and install, and suited to three-across in mid-size sedans.",
      "cells": [
        {
          "column": "Width",
          "fact": {
            "field": "dimensions",
            "value": "The seat measures 27 in high x 16.9 in wide x 12.5 in deep rear-facing, and 31 in high x 16.9 in wide x 12.5 in deep forward-facing.",
            "stated_as": "Car seat dimensions: 27\" H x 16.9\" W x 12.5\" D (rear-facing mode); 31\" H x 16.9\" W x 12.5\" D (forward-facing mode)",
            "source_type": "guide",
            "source_url": "https://modern-nursery-test-store.myshopify.com/products/clek-fllo-compact-convertible-car-seat",
            "source_read_at": "2026-10-21T17:21:35.144Z"
          }
        },
        {
          "column": "Three-across evidence",
          "fact": {
            "field": "positioning",
            "value": "The Fllo was described as the narrower, lighter alternative to the Foonf, at 25 lb, easier to move and install, and suited to three-across in mid-size sedans.",
            "stated_as": "The Fllo was described as the narrower, lighter alternative to the Foonf, at 25 lb, easier to move and install, and suited to three-across in mid-size sedans.",
            "source_type": "blog",
            "source_url": "https://teachtoddler.com/blog/clek-car-seat-review",
            "source_read_at": "2026-10-21T17:23:38.058Z"
          }
        },
        {
          "column": "Setup caveat",
          "fact": {
            "field": "vehicle fit",
            "value": "Although narrow, the seat is long rear-facing and may require the front passenger seat to move far forward; it may not suit compact cars.",
            "stated_as": "Although narrow, the seat is long rear-facing and may require the front passenger seat to move far forward; it may not suit compact cars.",
            "source_type": "review",
            "source_url": "https://bestcarseathub.com/reviews/clek-fllo/",
            "source_read_at": "2026-10-21T17:23:35.957Z"
          }
        },
        {
          "column": "Limits",
          "fact": null
        }
      ],
      "recall": {
        "status": "notice",
        "edition": 1,
        "index_read_at": "2026-09-25T21:56:43.040Z",
        "notices_fetched_at": "2026-09-25T15:02:47.095Z",
        "meaning": "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.",
        "notices": [
          {
            "key": "health-canada:76628",
            "regulator": "health-canada",
            "regulator_label": "Health Canada and Transport Canada",
            "id": "76628",
            "title": "Transport Canada Recall - 2024716 - CLEK",
            "date": "2024-11-07",
            "url": "https://recalls-rappels.canada.ca/en/alert-recall/transport-canada-recall-2024716-clek",
            "kind": "safety_notice",
            "batch_limited": true,
            "needs_testing": false
          }
        ]
      }
    },
    {
      "rank": 5,
      "merchant": {
        "slug": "modernnursery-com",
        "display_name": "modernnursery.com"
      },
      "product_id": "gid://shopify/Product/14974430282094",
      "name": "Maxi-Cosi Kani 4-in-1 Convertible Car Seat",
      "url": "/products/ucp/modernnursery-com/14974430282094",
      "why": "The three-across fit is not guaranteed and depends on the vehicle model.",
      "cells": [
        {
          "column": "Width",
          "fact": {
            "field": "dimensions and seat weight",
            "value": "Maximum dimensions are 30.25 in high by 19 in wide by 29 in deep; minimum dimensions are 19.25 in high by 19 in wide by 23.25 in deep; the seat weighs 23.2 lb.",
            "stated_as": "Dimensions: (Max) 30.25\"H x 19\"W x 29”D, (Min)19.25\"H x 19\"W x 23.25\"D\nWeight: 23.2 lbs",
            "source_type": "guide",
            "source_url": "https://modern-nursery-test-store.myshopify.com/products/maxi-cosi-kani-4-in-1-convertible-car-seat",
            "source_read_at": "2026-10-22T01:32:42.753Z"
          }
        },
        {
          "column": "Three-across evidence",
          "fact": {
            "field": "fit caveat",
            "value": "The three-across fit is not guaranteed and depends on the vehicle model.",
            "stated_as": "Car seat design fits 3 carseats across most large vehicle back seats (Actual fit may vary depending on the model of the vehicle.)",
            "source_type": "guide",
            "source_url": "https://modern-nursery-test-store.myshopify.com/products/maxi-cosi-kani-4-in-1-convertible-car-seat",
            "source_read_at": "2026-10-22T01:32:42.753Z"
          }
        },
        {
          "column": "Setup caveat",
          "fact": {
            "field": "fit warning",
            "value": "The maker warns that actual fit may vary and not all children will comfortably fit the full weight and height ranges.",
            "stated_as": "Actual fit may vary. Not all children will comfortably fit in the car seat for the full weight and height ranges listed.",
            "source_type": "listing",
            "source_url": "https://modern-nursery-test-store.myshopify.com/products.json",
            "source_read_at": "2026-10-21T19:31:31.510Z"
          }
        },
        {
          "column": "Limits",
          "fact": {
            "field": "height and weight limits from retailer",
            "value": "The retailer listing gives rear-facing 5–40 lb and 19–40 in, forward-facing 30–65 lb and 34.4–49 in, high-back booster 40–100 lb and 43.4–52 in, and backless booster 40–100 lb and 43.4–57 in; the maker's page instead gives forward-facing as 22–65 lb, so the sources disagree on the forward-facing lower limit.",
            "stated_as": "Rear-facing car seat (5–40 lbs., 19\"–40\")\nForward-facing car seat (30–65 lbs., 34.4\"–49\")\nBelt-positioning high back booster seat (40–100 lbs., 43.4\"–52\")\nBackless booster seat (40–100 lbs., 43.4\"–57\")",
            "source_type": "guide",
            "source_url": "https://modern-nursery-test-store.myshopify.com/products/maxi-cosi-kani-4-in-1-convertible-car-seat",
            "source_read_at": "2026-10-22T01:32:42.753Z"
          }
        }
      ]
    }
  ]
}