以下のガイドはまだ日本語に翻訳されていないため、英語で表示しています。計算機自体はすべて日本語に対応しています。
この計算機の使い方
- Choose the sizing system you know.
- Enter your size (half sizes allowed).
- Compare the results; for the best fit, measure your foot length and check the brand's own size chart.
計算式
Each system is derived from foot or shoe-last length with a different unit and starting point. US sizes step by 1/3 inch, EU (Paris points) by 2/3 cm, and Mondopoint is the foot length in centimeters.
US men = 3 × foot (in) − 22
US women ≈ US men + 1.5
UK ≈ US men − 1
EU ≈ 1.5 × (foot cm + 1.5)
Example
- US men's 9 → foot length ≈ 10.33 in (26.2 cm).
- US women's 10.5, UK 8, EU about 41.5–42.
よくある質問
Why do brands differ?
Shoe sizing isn't fully standardized. Lasts, widths and styles vary, so the same size can fit differently across brands and countries.
How do I measure my foot?
Stand on paper with your heel against a wall, mark the longest toe, and measure from the wall to the mark. Measure both feet in the evening and use the longer one.
Does this work for children's sizes?
No. Children's sizes use different scales; use a children's size chart.