How to use it
- Choose Men, Women or Kids.
- Pick the system you know (US, UK, EU, Japan cm, Mondopoint mm) and your size – or choose “Foot length in cm” and type your measurement.
- Select the system you want; the headline shows that size and the rows list all systems plus the foot length the size is meant for.
- Scroll the chart to see neighbouring sizes; click Select on any row to switch to it, and copy or share the result.
Example
A man’s foot measures 26.8 cm standing. The first chart row long enough is 270 mm, which is US 10, UK 9, EU 42½, Japan 27. In formulas: EU = 0.15 × 270 + 2 = 42.5; UK = 3 × 270 ÷ 25.4 − 23 = 8.9 → 9; US = UK + 1 = 10. A woman with the same foot would take US 11 / UK 9 / EU 42½ – the EU and UK numbers do not change with gender, only the US ones do.
Formulas and chart basis
L = foot length in mm (Mondopoint)
EU (Paris points) = 0.15 × L + 2 (rounded down to the half size)
UK adult = 3 × L / 25.4 − 23 (rounded to the half size)
UK child = 3 × L / 25.4 − 10 (child 13½ is followed by adult 1)
US men = UK + 1 US women = UK + 2 US child = UK child + ½ (restarts at 1 after 13½)
Japan = L / 10 cmThe adult rows from 215 to 320 mm are the correspondence table of ISO/TS 19407 (Footwear – Sizing – Conversion of sizing systems), which defines sizes by the length of the foot they are meant to fit; the rows for smaller adults and children follow the same formulas. US women’s sizes use the common retail offset of two numbers above UK (the older FIA scale used 1½). Japan’s JIS S 5037 and Mondopoint both state the foot length directly, so they need no conversion.
Men’s quick chart
| Foot cm | EU | UK | US |
|---|---|---|---|
| 24 | 38 | 5½ | 6½ |
| 25 | 39½ | 6½ | 7½ |
| 26 | 41 | 7½ | 8½ |
| 27 | 42½ | 9 | 10 |
| 28 | 44 | 10 | 11 |
| 29 | 45½ | 11 | 12 |
| 30 | 47 | 12½ | 13½ |
| 31 | 48½ | 13½ | 14½ |
| 32 | 50 | 15 | 16 |
Women’s quick chart
| Foot cm | EU | UK | US |
|---|---|---|---|
| 21 | 33½ | 2 | 4 |
| 22 | 35 | 3 | 5 |
| 23 | 36½ | 4 | 6 |
| 24 | 38 | 5½ | 7½ |
| 25 | 39½ | 6½ | 8½ |
| 26 | 41 | 7½ | 9½ |
| 27 | 42½ | 9 | 11 |
| 28 | 44 | 10 | 12 |
| 29 | 45½ | 11 | 13 |
Sources: ISO/TS 19407 – Footwear – Sizing – Conversion of sizing systems, Wikipedia – Shoe size (systems, formulas and the ISO/TS 19407 table).
Shoe sizes are not standardised across brands: lasts, widths and labelling differ, and many makers round differently (some use US = UK + ½ for men). Treat the chart as a translation of nominal sizes, measure your feet, and use the manufacturer’s own table when it exists.
How to measure your foot
Stand on a sheet of paper in the socks you will wear, mark the heel and the tip of the longest toe, and measure the distance in cm; do both feet and use the longer one. Measure in the afternoon, when feet are slightly larger. The chart’s foot length is the longest foot a size is designed for, so a 26.8 cm foot takes the 27 cm row; if you prefer room for thick socks or running, go one half size up.
Questions
- What is a US men’s 10 in EU and UK?
- EU 42½ and UK 9, for a foot of about 27 cm. Brands differ: Nike lists EU 44 for US 10 and Adidas EU 44, while the ISO table gives 42½–43, so always check the brand chart.
- Why are women’s US sizes bigger than men’s for the same foot?
- US women’s sizing starts its count lower, so the same foot length gets a number about 1½–2 higher than in men’s sizing (a women’s 9 and a men’s 7 are both about 25.5 cm). UK and EU use one scale for adults of either sex.
- How do kids’ sizes work?
- Children’s sizes count up from UK 0/US ½ for infants to UK 13½/US 1 at about 20 cm; after that the adult scale begins at 1 (US “youth” 1–7). A 17 cm foot is UK 10, US 10½, EU 27½.
- Is EU size the same as Japanese size?
- No. EU sizes are Paris points (⅔ cm per step, measured on the last), while Japanese sizes simply state the foot length in centimetres, so EU 42½ corresponds to Japan 27.