{
  "schema_version": "compare-page.v2",
  "page_id": "booster-seats-for-three-across-in-a-back-seat",
  "url": "https://robotrunk.com/compare/want/booster-seats-for-three-across-in-a-back-seat",
  "title": "Narrow backless booster seats for three across",
  "question": "Which backless booster seats are narrow enough to possibly fit three across in a back seat?",
  "answer": "Britax UpNGo Click Backless Booster Car Seat: The seat is 17.1 inches wide, which Britax calls its SpaceSaver design. Britax says the slim seat is designed to fit three across in most vehicles but cannot guarantee three-across fitment in every vehicle. Britax UpNGo Backless Booster Car Seat: Mega Babies lists dimensions of 9 inches high, 15.5 inches deep and 17.1 inches wide; Consumer Reports lists overall width as 17 inches, so the sources differ on width.",
  "kind": "car seats - booster",
  "market": "US",
  "generated_at": "2026-10-18T10:41:27.077Z",
  "columns": [
    "Width",
    "Three-across fit",
    "Weight"
  ],
  "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.f7",
      "product": "Britax UpNGo Backless Booster Car Seat",
      "field": "dimensions",
      "value": "Mega Babies lists dimensions of 9 inches high, 15.5 inches deep and 17.1 inches wide; Consumer Reports lists overall width as 17 inches, so the sources differ on width.",
      "stated_as": "Dimensions: 9\"H x 15.5\"D x 17.1\"W",
      "source_type": "guide",
      "source_url": "https://top-stroll.myshopify.com/products/britax-up-n-go-backless-booster-car-seat",
      "source_read_at": "2026-10-17T23:47:50.135Z"
    },
    {
      "ref": "p1.f11",
      "product": "Britax UpNGo Backless Booster Car Seat",
      "field": "weight",
      "value": "Mega Babies lists the seat weight as 3.1 lbs; Consumer Reports lists 5 lbs, so the sources disagree.",
      "stated_as": "Product weight: 3.1 lbs.",
      "source_type": "guide",
      "source_url": "https://top-stroll.myshopify.com/products/britax-up-n-go-backless-booster-car-seat",
      "source_read_at": "2026-10-17T23:47:50.135Z"
    },
    {
      "ref": "p2.f5",
      "product": "Britax UpNGo Click Backless Booster Car Seat",
      "field": "seat width",
      "value": "The seat is 17.1 inches wide, which Britax calls its SpaceSaver design.",
      "stated_as": "SpaceSaver™ Design: 17.1” seat leaves plenty of room for siblings & carpoolers!",
      "source_type": "listing",
      "source_url": "https://top-stroll.myshopify.com/products.json",
      "source_read_at": "2026-10-17T19:35:52.669Z"
    },
    {
      "ref": "p2.f7",
      "product": "Britax UpNGo Click Backless Booster Car Seat",
      "field": "three-across fit",
      "value": "Britax says the slim seat is designed to fit three across in most vehicles but cannot guarantee three-across fitment in every vehicle.",
      "stated_as": "*Britax cannot guarantee 3-across fitment in all vehicles.",
      "source_type": "listing",
      "source_url": "https://top-stroll.myshopify.com/products.json",
      "source_read_at": "2026-10-17T19:35:52.669Z"
    },
    {
      "ref": "p2.f9",
      "product": "Britax UpNGo Click Backless Booster Car Seat",
      "field": "weight",
      "value": "The booster weighs under 5 lbs.",
      "stated_as": "Weighing under 5 lbs, it’s easy for both caregivers and kids to carry.",
      "source_type": "listing",
      "source_url": "https://top-stroll.myshopify.com/products.json",
      "source_read_at": "2026-10-17T19:35:52.669Z"
    }
  ],
  "rows": [
    {
      "rank": 1,
      "merchant": {
        "slug": "megababiesusa-com",
        "display_name": "megababiesusa.com"
      },
      "product_id": "gid://shopify/Product/9087540953342",
      "name": "Britax UpNGo Click Backless Booster Car Seat",
      "url": "/products/ucp/megababiesusa-com/9087540953342",
      "why": "Britax says the slim seat is designed to fit three across in most vehicles but cannot guarantee three-across fitment in every vehicle.",
      "cells": [
        {
          "column": "Width",
          "fact": {
            "field": "seat width",
            "value": "The seat is 17.1 inches wide, which Britax calls its SpaceSaver design.",
            "stated_as": "SpaceSaver™ Design: 17.1” seat leaves plenty of room for siblings & carpoolers!",
            "source_type": "listing",
            "source_url": "https://top-stroll.myshopify.com/products.json",
            "source_read_at": "2026-10-17T19:35:52.669Z"
          }
        },
        {
          "column": "Three-across fit",
          "fact": {
            "field": "three-across fit",
            "value": "Britax says the slim seat is designed to fit three across in most vehicles but cannot guarantee three-across fitment in every vehicle.",
            "stated_as": "*Britax cannot guarantee 3-across fitment in all vehicles.",
            "source_type": "listing",
            "source_url": "https://top-stroll.myshopify.com/products.json",
            "source_read_at": "2026-10-17T19:35:52.669Z"
          }
        },
        {
          "column": "Weight",
          "fact": {
            "field": "weight",
            "value": "The booster weighs under 5 lbs.",
            "stated_as": "Weighing under 5 lbs, it’s easy for both caregivers and kids to carry.",
            "source_type": "listing",
            "source_url": "https://top-stroll.myshopify.com/products.json",
            "source_read_at": "2026-10-17T19:35:52.669Z"
          }
        }
      ]
    },
    {
      "rank": 2,
      "merchant": {
        "slug": "megababiesusa-com",
        "display_name": "megababiesusa.com"
      },
      "product_id": "gid://shopify/Product/9087535939838",
      "name": "Britax UpNGo Backless Booster Car Seat",
      "url": "/products/ucp/megababiesusa-com/9087535939838",
      "why": "Mega Babies lists dimensions of 9 inches high, 15.5 inches deep and 17.1 inches wide; Consumer Reports lists overall width as 17 inches, so the sources differ on width.",
      "cells": [
        {
          "column": "Width",
          "fact": {
            "field": "dimensions",
            "value": "Mega Babies lists dimensions of 9 inches high, 15.5 inches deep and 17.1 inches wide; Consumer Reports lists overall width as 17 inches, so the sources differ on width.",
            "stated_as": "Dimensions: 9\"H x 15.5\"D x 17.1\"W",
            "source_type": "guide",
            "source_url": "https://top-stroll.myshopify.com/products/britax-up-n-go-backless-booster-car-seat",
            "source_read_at": "2026-10-17T23:47:50.135Z"
          }
        },
        {
          "column": "Three-across fit",
          "fact": null
        },
        {
          "column": "Weight",
          "fact": {
            "field": "weight",
            "value": "Mega Babies lists the seat weight as 3.1 lbs; Consumer Reports lists 5 lbs, so the sources disagree.",
            "stated_as": "Product weight: 3.1 lbs.",
            "source_type": "guide",
            "source_url": "https://top-stroll.myshopify.com/products/britax-up-n-go-backless-booster-car-seat",
            "source_read_at": "2026-10-17T23:47:50.135Z"
          }
        }
      ]
    }
  ]
}