How the conversion works
Add 1 to the UK size for the men's US size (4 + 1 = 5), then add 1.5 for the women's US size (6.5).
Sizes near 4
| UK size | Men's US | Women's US | UK | EU | Foot length (cm) |
|---|---|---|---|---|---|
| 2.5 | 3.5 | 5 | 2.5 | 36.5 | 21.5 |
| 3 | 4 | 5.5 | 3 | 37 | 22 |
| 3.5 | 4.5 | 6 | 3.5 | 37.5 | 22.5 |
| 4 | 5 | 6.5 | 4 | 38 | 23 |
| 4.5 | 5.5 | 7 | 4.5 | 38.5 | 23.5 |
| 5 | 6 | 7.5 | 5 | 39 | 24 |
| 5.5 | 6.5 | 8 | 5.5 | 39.5 | 24.5 |
Common questions
Does this work for every brand?
This site uses one standard set of rules, so size 4 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 uk to us shoe size chart or read how we convert.