Orthofeet UK Size Conversions
Womens
| UK | US | EU |
| 3 | 5 | 35.5 |
| 4 | 6 | 36.5 |
| 4.5 | 6.5 | 37 |
| 5 | 7 | 37.5 |
| 5.5 | 7.5 | 38 |
| 6 | 8 | 38.5 |
| 6.5 | 8.5 | 39 |
| 7 | 9 | 39.5 |
| 7.5 | 9.5 | 40 |
| 8 | 10 | 40.5 |
Mens
| UK | US | EU |
| 7 | 7.5 | 40.5 |
| 7.5 | 8 | 41 |
| 8 | 8.5 | 41.5 |
| 8.5 | 9 | 42 |
| 9 | 9.5 | 42.5 |
| 9.5 | 10 | 43 |
| 10 | 10.5 | 43.5 |
| 10.5 | 11 | 44 |
| 11 | 11.5 | 44.5 |
| 11.5 | 12 | 45 |
| 12.5 | 13 | 46 |
| 13.5 | 14 | 47 |