Japanese Shoe Size Converter

The conversion is a read-straight-across job rather than a calculation. Find your JP number in the "JP (cm)" column of the chart above and the US, UK and EU figures sit on the same row. Because the JP value is your foot length, the row you land on is fixed by your foot — only the destination columns change. For a woman's foot, JP 24 lines up with about US 7.5, UK 5.5 and EU 37–38; for a man's foot, JP 27 lands at roughly US 9.5–10, UK 9–9.5 and EU 42–43.

The one wrinkle is that a single JP number translates differently between the men's and women's ladders, so always pick the table that matches who the shoe is for. US women's sizes run roughly 1.5 numbers higher than US men's for the same foot, while EU sizing is measured in Paris points and shows up as the same EU figure regardless of gender. If you want the full background on how the Japanese system is built, see our guide to Japanese shoe sizes.

Most sizing systems are abstract ladders: a US 9 or a UK 8 is just a position on a scale, and you have to trust a chart to tell you what length it represents. Japanese sizing skips that layer entirely because the number is the measurement. Once you have measured your foot in centimetres, you have effectively already found your JP size — a 25.0 cm foot is JP 25.0, with nothing to look up.

That makes JP the most reliable starting point for any conversion. Instead of guessing where you fall on the US or UK ladder and hoping the brand agrees, you anchor on a real length and then read across to whatever system you need. It also makes mistakes easy to catch: if a converted size feels wrong, you can sanity-check it against your actual centimetre measurement rather than against another approximate number.

Japanese brands such as ASICS, Mizuno and Onitsuka Tiger, along with most Japanese marketplaces, print sizes in centimetres rather than US or UK numbers. To order with confidence, measure the length of your longer foot in centimetres and pick the JP/cm figure closest to that measurement. If you fall between two listed sizes, round up to the larger one so the shoe is not too short — you can take up a touch of extra room with an insole far more easily than you can stretch a shoe that is too small.

Keep in mind that the JP/cm label describes the intended foot length, not the inside of the shoe, so different lasts still fit differently even at the same stated size. Athletic shoes from a single maker tend to be consistent, but boots, formal styles and narrow-cut models may run tighter. When a product page lists a centimetre range or an insole length, match it to your own measurement before adding anything else into the equation. To re-measure accurately, follow our guide to measuring your foot in centimetres.