Men's
| UK | EU | US |
|---|---|---|
| 5 | 39 | 6 |
| 5.5 | 39.5 | 6.5 |
| 6 | 40 | 7 |
| 6.5 | 40.5 | 7.5 |
| 7 | 41 | 8 |
| 7.5 | 41.5 | 8.5 |
| 8 | 42 | 9 |
| 8.5 | 42.5 | 9.5 |
| 9 | 43 | 10 |
| 9.5 | 43.5 | 10.5 |
| 10 | 44 | 11 |
| 10.5 | 44.5 | 11.5 |
| 11 | 45 | 12 |
| 12 | 46 | 13 |
Caterpillar Size Guide
Women's
| UK | EU | US |
|---|---|---|
| 3 | 36 | 5 |
| 3.5 | 36.5 | 5.5 |
| 4 | 37 | 6 |
| 4.5 | 37.5 | 6.5 |
| 5 | 38 | 7 |
| 5.5 | 38.5 | 7.5 |
| 6 | 39 | 8 |
| 6.5 | 39.5 | 8.5 |
| 7 | 40 | 9 |
| 7.5 | 40.5 | 9.5 |
| 8 | 41 | 10 |
| 9 | 42 | 11 |
Unisex
| UK | EU | US |
|---|---|---|
| 2 | 36 | 3 |
| 3 | 37 | 4 |
| 4 | 38 | 5 |
| 5 | 39 | 6 |
| 6 | 40 | 7 |
| 7 | 41 | 8 |
| 8 | 42 | 9 |
| 9 | 43 | 10 |
| 10 | 44 | 11 |
| 11 | 45 | 12 |
| 12 | 46 | 13 |
| 13 | 47 | 14 |
| 14 | 48 | 15 |