| Size | US (Men's) | US (Women's) | Mondo |
| Extra Small | 5 to 6 | 6 to 7 | 22.5 – 24.5 |
| Small | 7 to 8 | 8 to 9 | 25 – 26.5 |
| Medium | 9 to 10 | 10 to 11 | 27 – 28.5 |
| Large | 11 to 12 | 12 to 13 | 29 – 30.5 |
| Extra Large | 13 to 14 | 14 to 15 | 31 – 32.5 |
| Size | US (Men's) | US (Women's) | Mondo |
| Extra Small | 5 to 6 | 6 to 7 | 22.5 – 24.5 |
| Small | 7 to 8 | 8 to 9 | 25 – 26.5 |
| Medium | 9 to 10 | 10 to 11 | 27 – 28.5 |
| Large | 11 to 12 | 12 to 13 | 29 – 30.5 |
| Extra Large | 13 to 14 | 14 to 15 | 31 – 32.5 |