Calculator
Boot size converter
Enter your foot length in millimetres, or a size you already know. The converter uses the common adult chart; brands vary, so check the maker's own chart too.
In short
One full UK size is 1/3 inch (8.47 mm). US men = UK + 1, US women = UK + 2. Allow about 15 to 20 mm (a thumb's width) of toe room inside the boot.
Convert
Last
- UK
- 8.5
- EU
- 42.5
- US men
- 9.5
- Mondopoint
- 265
Foot length 265 mm (10.4 in). With toe room, look for an inside length of about 280 to 285 mm, roughly a thumb's width beyond your longest toe.
Common adult chart: brands vary, check the maker's chart. Measure in the evening, in your walking socks.
Common adult sizes
| Foot length | UK | EU | US men | US women |
|---|---|---|---|---|
| 220 mm | 3 | 35.5 | 4 | 5 |
| 245 mm | 6 | 39.5 | 7 | 8 |
| 262 mm | 8 | 42 | 9 | 10 |
| 279 mm | 10 | 44.5 | 11 | 12 |
| 296 mm | 12 | 47 | 13 | 14 |