{
  "site": {
    "name": "Sizelane",
    "url": "https://sizelane.com/",
    "about": "https://sizelane.com/about",
    "license": "CC BY 4.0",
    "licenseUrl": "https://creativecommons.org/licenses/by/4.0/",
    "attribution": "Name Sizelane, link to the brand page and keep the brand's official source link."
  },
  "page": "https://sizelane.com/altra-size-chart",
  "brand": "Altra",
  "slug": "altra",
  "category": "running",
  "origin": "US",
  "checked": "2026-10-24",
  "officialLinks": {
    "website": "https://www.altrarunning.com/en-us",
    "sizeGuide": "https://www.altrarunning.com/en-us/pages/size-chart",
    "storeLocator": "https://www.altrarunning.com/en-us/pages/stores",
    "help": "https://www.altrarunning.com/en-us/pages/faqs",
    "regional": [
      {
        "market": "Canada",
        "url": "https://www.altrarunning.com/en-ca/pages/size-chart"
      },
      {
        "market": "UK",
        "url": "https://eu.altrarunning.com/en-gb"
      },
      {
        "market": "Germany",
        "url": "https://eu.altrarunning.com/de-de"
      },
      {
        "market": "France",
        "url": "https://eu.altrarunning.com/fr-fr"
      },
      {
        "market": "Italy",
        "url": "https://eu.altrarunning.com/it-it"
      },
      {
        "market": "Spain",
        "url": "https://eu.altrarunning.com/es-es"
      },
      {
        "market": "Netherlands",
        "url": "https://eu.altrarunning.com/nl-nl"
      },
      {
        "market": "Ireland",
        "url": "https://eu.altrarunning.com/en-ie"
      },
      {
        "market": "Sweden",
        "url": "https://eu.altrarunning.com/en-se"
      },
      {
        "market": "Switzerland",
        "url": "https://eu.altrarunning.com/de-ch"
      },
      {
        "market": "Austria",
        "url": "https://eu.altrarunning.com/de-at"
      },
      {
        "market": "Denmark",
        "url": "https://eu.altrarunning.com/en-dk"
      }
    ],
    "outlet": "https://www.altrarunning.com/en-us/collections/sale",
    "collections": [
      {
        "label": "Men's Road",
        "url": "https://www.altrarunning.com/en-us/collections/mens-road-running-shoes"
      },
      {
        "label": "Men's Trail",
        "url": "https://www.altrarunning.com/en-us/collections/mens-trail-running-shoes"
      },
      {
        "label": "Women's Road",
        "url": "https://www.altrarunning.com/en-us/collections/womens-road-running-shoes"
      },
      {
        "label": "Women's Trail",
        "url": "https://www.altrarunning.com/en-us/collections/womens-trail-running-shoes"
      },
      {
        "label": "Men's Hiking",
        "url": "https://www.altrarunning.com/en-us/collections/mens-hiking-shoes"
      }
    ]
  },
  "sizeCharts": [
    {
      "id": "men",
      "label": "Men's shoes",
      "source": "https://www.altrarunning.com/en-us/pages/size-chart",
      "lengthMeaning": "foot",
      "lengthScales": {
        "CM": "size"
      },
      "columns": [
        "US",
        "UK",
        "EU",
        "CM"
      ],
      "rows": [
        [
          "4",
          "3",
          "37",
          "22"
        ],
        [
          "4.5",
          "3.5",
          "37.5",
          "22.5"
        ],
        [
          "5",
          "4",
          "38",
          "23"
        ],
        [
          "5.5",
          "4.5",
          "38.5",
          "23.5"
        ],
        [
          "6",
          "5",
          "39",
          "24"
        ],
        [
          "6.5",
          "5.5",
          "39.5",
          "24.5"
        ],
        [
          "7",
          "6",
          "40",
          "25"
        ],
        [
          "7.5",
          "6.5",
          "40.5",
          "25.5"
        ],
        [
          "8",
          "7",
          "41",
          "26"
        ],
        [
          "8.5",
          "7.5",
          "42",
          "26.5"
        ],
        [
          "9",
          "8",
          "42.5",
          "27"
        ],
        [
          "9.5",
          "8.5",
          "43",
          "27.5"
        ],
        [
          "10",
          "9",
          "44",
          "28"
        ],
        [
          "10.5",
          "9.5",
          "44.5",
          "28.5"
        ],
        [
          "11",
          "10",
          "45",
          "29"
        ],
        [
          "11.5",
          "10.5",
          "46",
          "29.5"
        ],
        [
          "12",
          "11",
          "46.5",
          "30"
        ],
        [
          "12.5",
          "11.5",
          "47",
          "30.5"
        ],
        [
          "13",
          "12",
          "48",
          "31"
        ],
        [
          "14",
          "13",
          "49",
          "32"
        ],
        [
          "15",
          "14",
          "50",
          "33"
        ],
        [
          "16",
          "15",
          "51.5",
          "34"
        ]
      ],
      "notes": "Brand headers: U.S., U.K., E.U., CM. The page advises measuring your foot in centimetres and cross-referencing it with the chart.",
      "corrections": [],
      "lengthAnomalies": [],
      "csv": "https://sizelane.com/data/brands/altra-men.csv"
    },
    {
      "id": "women",
      "label": "Women's shoes",
      "source": "https://www.altrarunning.com/en-us/pages/size-chart",
      "lengthMeaning": "foot",
      "lengthScales": {
        "CM": "size"
      },
      "columns": [
        "US",
        "UK",
        "EU",
        "CM"
      ],
      "rows": [
        [
          "4",
          "2",
          "34.5",
          "20.5"
        ],
        [
          "4.5",
          "2.5",
          "35",
          "21"
        ],
        [
          "5",
          "3",
          "35.5",
          "21.5"
        ],
        [
          "5.5",
          "3.5",
          "36",
          "22"
        ],
        [
          "6",
          "4",
          "37",
          "22.5"
        ],
        [
          "6.5",
          "4.5",
          "37.5",
          "23"
        ],
        [
          "7",
          "5",
          "38",
          "23.5"
        ],
        [
          "7.5",
          "5.5",
          "38.5",
          "24"
        ],
        [
          "8",
          "6",
          "39",
          "24.5"
        ],
        [
          "8.5",
          "6.5",
          "40",
          "25"
        ],
        [
          "9",
          "7",
          "40.5",
          "25.5"
        ],
        [
          "9.5",
          "7.5",
          "41",
          "26"
        ],
        [
          "10",
          "8",
          "42",
          "26.5"
        ],
        [
          "10.5",
          "8.5",
          "42.5",
          "27"
        ],
        [
          "11",
          "9",
          "43",
          "27.5"
        ],
        [
          "11.5",
          "9.5",
          "44",
          "28"
        ],
        [
          "12",
          "10",
          "44.5",
          "28.5"
        ],
        [
          "13",
          "11",
          "46",
          "29.5"
        ]
      ],
      "notes": "Brand headers: U.S., U.K., E.U., CM. The page advises measuring your foot in centimetres and cross-referencing it with the chart.",
      "corrections": [],
      "lengthAnomalies": [],
      "csv": "https://sizelane.com/data/brands/altra-women.csv"
    }
  ],
  "modelCharts": [],
  "widths": null,
  "fitGuidance": [
    {
      "text": "Measure your foot in centimetres before ordering, then use the chart to find your US, UK or EU size.",
      "source": "https://www.altrarunning.com/en-us/pages/size-chart"
    },
    {
      "text": "Every Altra shoe has a roomy FootShape toe box (not a wide shoe); styles come in Original (roomiest), Standard and Racing (snug midfoot) FootShape fits.",
      "source": "https://www.altrarunning.com/en-us/pages/footshape-fits"
    },
    {
      "text": "A few styles are offered in wide versions with a wider midfoot as well as the roomy toe box.",
      "source": "https://www.altrarunning.com/en-us/pages/footshape-fits"
    }
  ],
  "unverified": [
    "Altra's size chart lists no width options (such as D or 2E), so no widths are shown.",
    "Altra's size chart page has no kids' chart."
  ]
}