How the conversion works
Subtract 33 from the EU size for the men's US size (40 - 33 = 7), then add 1.5 for the women's US size (8.5).
Sizes near 40
| EU size | Men's US | Women's US | UK | EU | Foot length (cm) |
|---|---|---|---|---|---|
| 38.5 | 5.5 | 7 | 4.5 | 38.5 | 23.5 |
| 39 | 6 | 7.5 | 5 | 39 | 24 |
| 39.5 | 6.5 | 8 | 5.5 | 39.5 | 24.5 |
| 40 | 7 | 8.5 | 6 | 40 | 25 |
| 40.5 | 7.5 | 9 | 6.5 | 40.5 | 25.5 |
| 41 | 8 | 9.5 | 7 | 41 | 26 |
| 41.5 | 8.5 | 10 | 7.5 | 41.5 | 26.5 |
Common questions
Does this work for every brand?
This site uses one standard set of rules, so size 40 is a guide, not a guarantee. Brands often differ by half a size or a full size, especially between men's and women's lines. Check the maker's own chart when you can.
How do I measure my foot?
Stand on a sheet of paper, mark your heel and your longest toe, then measure the gap in centimetres. Match it to the foot length column and pick the closest size.
What if I am between sizes?
Order the larger size, unless the brand says its shoes run large. Add a thin sock allowance if you wear thick socks.
Other sizes
See the full eu to us shoe size chart or read how we convert.