DUI RockBoot sizing by shoe size.
| Men's US | Women's US | UK | Europe | RockBoot™ |
|---|---|---|---|---|
| 4 | 5.5 | 3 | 36 | 4 |
| 4.5 | 6 | 3.5 | — | 5 |
| 5 | 6.5 | 4 | 37 | 5 |
| 5.5 | 7 | 4.5 | — | 6 |
| 6 | 7.5 | 5 | 38 | 6 |
| 6.5 | 8 | 5.5 | — | 7 |
| 7 | 8.5 | 6 | 39 | 7 |
| 7.5 | 9 | 6.5 | — | 8 |
| 8 | 9.5 | 7 | 40–41 | 8 |
| 8.5 | 10 | 7.5 | — | 9 |
| 9 | 10.5 | 8 | 42 | 9 |
| 9.5 | 11 | 8.5 | — | 10 |
| 10 | 11.5 | 9 | 43 | 10 |
| 10.5 | 12 | 9.5 | — | 11 |
| 11 | 12.5 | 10 | 44 | 11 |
| 11.5 | — | 10.5 | — | 12 |
| 12 | — | 11 | 45–46 | 12 |
| 12.5 | — | 11.5 | — | 13 |
| 13 | — | 12 | 47 | 13 |
| 13.5 | — | 12.5 | — | 14 |
| 14 | — | 13 | 48 | 14 |
DUI makes RockBoots in sizes 4 to 15; DUI’s chart lists RockBoot sizes up to 14.
Source: DUI’s size chart.