{
  "schema_version": "compare-page.v2",
  "page_id": "bike-helmet-sizes-by-head-circumference",
  "url": "https://robotrunk.com/compare/want/bike-helmet-sizes-by-head-circumference",
  "title": "Bike helmet sizes by head circumference",
  "question": "Which bike helmet size fits a given head circumference?",
  "answer": "Banwood Eco Helmet: The Australian maker page says ages 3+, head circumference 50–54 cm, and Australian/New Zealand Standards certified; the UK maker page gives ages 2–7 and 52–56 cm, so the age and size figures disagree. The maker says the age range is only an estimate and the child’s head should be measured before ordering. Banwood Classic Helmet: The XS size is 48–52 cm, approximate age 18 months to 4 years. Straps should not cover the ears and the buckle should stay away from the jawbone.",
  "kind": "bike helmet",
  "market": "US",
  "generated_at": "2026-10-26T21:41:46.921Z",
  "columns": [
    "Head size range",
    "Measure first",
    "Strap fit"
  ],
  "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.f11",
      "product": "Banwood Classic Helmet",
      "field": "XS sizing",
      "value": "The XS size is 48–52 cm, approximate age 18 months to 4 years.",
      "stated_as": "XS - 48-52 cm - Approximate age range 18M - 4Y",
      "source_type": "guide",
      "source_url": "https://www.banwood.com.au/products/classic-helmet-cream",
      "source_read_at": "2026-10-21T11:55:19.456Z"
    },
    {
      "ref": "p1.f12",
      "product": "Banwood Classic Helmet",
      "field": "strap fit",
      "value": "Straps should not cover the ears and the buckle should stay away from the jawbone.",
      "stated_as": "adjust the straps that do not cover the ears, keep the buckle position away\nfrom the jawbone",
      "source_type": "manual",
      "source_url": "https://www.berceaumagique.com/support/pdf/7949/%5Bbanwood%5D-notice-casque.pdf",
      "source_read_at": "2026-10-21T11:55:23.738Z"
    },
    {
      "ref": "p3.f6",
      "product": "Banwood Eco Helmet",
      "field": "size and certification",
      "value": "The Australian maker page says ages 3+, head circumference 50–54 cm, and Australian/New Zealand Standards certified; the UK maker page gives ages 2–7 and 52–56 cm, so the age and size figures disagree.",
      "stated_as": "Designed for ages 3 years +, it fits head circumferences between 50–54 cm and is Australian/New Zealand Standards certified for reliable protection.",
      "source_type": "guide",
      "source_url": "https://www.banwood.com.au/products/eco-helmet-sand-50-54-cm",
      "source_read_at": "2026-10-21T11:58:14.488Z"
    },
    {
      "ref": "p3.f10",
      "product": "Banwood Eco Helmet",
      "field": "age guidance",
      "value": "The maker says the age range is only an estimate and the child’s head should be measured before ordering.",
      "stated_as": "This is an estimate only please make sure to measure your child's head prior to ordering.",
      "source_type": "guide",
      "source_url": "https://www.banwood.com.au/products/eco-helmet-sand-50-54-cm",
      "source_read_at": "2026-10-21T11:58:14.488Z"
    }
  ],
  "rows": [
    {
      "rank": 1,
      "merchant": {
        "slug": "modernnursery-com",
        "display_name": "modernnursery.com"
      },
      "product_id": "gid://shopify/Product/14733684736366",
      "name": "Banwood Eco Helmet",
      "url": "/products/ucp/modernnursery-com/14733684736366",
      "why": "The Australian maker page says ages 3+, head circumference 50–54 cm, and Australian/New Zealand Standards certified; the UK maker page gives ages 2–7 and 52–56 cm, so the age and size figures disagree.",
      "cells": [
        {
          "column": "Head size range",
          "fact": {
            "field": "size and certification",
            "value": "The Australian maker page says ages 3+, head circumference 50–54 cm, and Australian/New Zealand Standards certified; the UK maker page gives ages 2–7 and 52–56 cm, so the age and size figures disagree.",
            "stated_as": "Designed for ages 3 years +, it fits head circumferences between 50–54 cm and is Australian/New Zealand Standards certified for reliable protection.",
            "source_type": "guide",
            "source_url": "https://www.banwood.com.au/products/eco-helmet-sand-50-54-cm",
            "source_read_at": "2026-10-21T11:58:14.488Z"
          }
        },
        {
          "column": "Measure first",
          "fact": {
            "field": "age guidance",
            "value": "The maker says the age range is only an estimate and the child’s head should be measured before ordering.",
            "stated_as": "This is an estimate only please make sure to measure your child's head prior to ordering.",
            "source_type": "guide",
            "source_url": "https://www.banwood.com.au/products/eco-helmet-sand-50-54-cm",
            "source_read_at": "2026-10-21T11:58:14.488Z"
          }
        },
        {
          "column": "Strap fit",
          "fact": null
        }
      ]
    },
    {
      "rank": 2,
      "merchant": {
        "slug": "modernnursery-com",
        "display_name": "modernnursery.com"
      },
      "product_id": "gid://shopify/Product/6545851351140",
      "name": "Banwood Classic Helmet",
      "url": "/products/ucp/modernnursery-com/6545851351140",
      "why": "The XS size is 48–52 cm, approximate age 18 months to 4 years.",
      "cells": [
        {
          "column": "Head size range",
          "fact": {
            "field": "XS sizing",
            "value": "The XS size is 48–52 cm, approximate age 18 months to 4 years.",
            "stated_as": "XS - 48-52 cm - Approximate age range 18M - 4Y",
            "source_type": "guide",
            "source_url": "https://www.banwood.com.au/products/classic-helmet-cream",
            "source_read_at": "2026-10-21T11:55:19.456Z"
          }
        },
        {
          "column": "Measure first",
          "fact": null
        },
        {
          "column": "Strap fit",
          "fact": {
            "field": "strap fit",
            "value": "Straps should not cover the ears and the buckle should stay away from the jawbone.",
            "stated_as": "adjust the straps that do not cover the ears, keep the buckle position away\nfrom the jawbone",
            "source_type": "manual",
            "source_url": "https://www.berceaumagique.com/support/pdf/7949/%5Bbanwood%5D-notice-casque.pdf",
            "source_read_at": "2026-10-21T11:55:23.738Z"
          }
        }
      ]
    }
  ]
}