{
  "brand": "Birkenstock",
  "slug": "birkenstock",
  "records": [
    {
      "gender": "men",
      "foot_length_mm": 275,
      "fit_offset": 0.5,
      "confidence": 0.68,
      "width_grade": "D",
      "width_availability": [
        "B",
        "D"
      ],
      "sizes": {
        "us_mens": 10.5,
        "us_womens": 12,
        "uk": 9.5,
        "eu": 41,
        "cm": 27.5
      },
      "provenance": [
        {
          "source_type": "official_chart",
          "captured_date": "2026-06-21",
          "sample_size_n": null
        },
        {
          "source_type": "review_aggregate",
          "captured_date": "2026-06-21",
          "sample_size_n": 1100
        }
      ]
    },
    {
      "gender": "women",
      "foot_length_mm": 248,
      "fit_offset": 0.5,
      "confidence": 0.65,
      "width_grade": "B",
      "width_availability": [
        "B",
        "D"
      ],
      "sizes": {
        "us_mens": 7.5,
        "us_womens": 9,
        "uk": 6.5,
        "eu": 37,
        "cm": 25
      },
      "provenance": [
        {
          "source_type": "official_chart",
          "captured_date": "2026-06-21",
          "sample_size_n": null
        },
        {
          "source_type": "review_aggregate",
          "captured_date": "2026-06-21",
          "sample_size_n": 1100
        }
      ]
    }
  ],
  "_meta": {
    "generated": "2026-06-21",
    "last_modified": "2026-06-21",
    "license": "CC BY 4.0 — attribution required: shoesizeguide.com",
    "docs": "https://shoesizeguide.com/widget/"
  }
}