| Size | Average Shoe Size | |||
| Small | US: M 4-6 | W 4-6.5 | UK: 2-4 | EU: 34.5-37.5 |
| Medium | US: M 6.5-9.5 | W 7-10 | UK: 4.5-8.5 | EU: 38.5-43 |
| Large | US: M 10-12.5 | W 10.5-PLUS | UK: 9.5-12 | EU: 43-47.5 |
| X-Large | US: M 13+ | --- | UK: 12.5-14 | EU: 48+ |
| Size | Ankle Circumference | Calf Circumference |
|
Small |
7-8.5 in | 18-21 cm | 11-15 in | 28-38 cm |
|
Medium |
8.25-10 in | 21-25 cm | 12-16.5 in | 30-42 cm |
|
Large |
10-11.5 in | 25-29 cm | 12.5-16.5 in | 32-46 cm |
| X-Large | 11.5-13 in | 29-33 cm | 13-19 in | 34-49 cm |