| Sock Size | USA | UK | EC | ||
| Men | Women | Youth | |||
| XXS 3-5 | 7 - 10 | ||||
| XS 5-7 | 10 - 13 | ||||
| S 7-9 | 4 - 6 | 1 - 4 | 12 - 3 1/2 | 30 - 36 1/2 | |
| M 9-11 | 5 - 8 1/2 | 6 1/2 - 10 | 4 - 7 1/2 | 37 - 41 1/2 | |
| L 11-13 | 9 - 12 | 10 1/2 - 12 | 8 - 11 1/2 | 42 - 46 | |
| XL 13-15 | 12 - 15 | 12 | 46 1/2 | ||
Measurements stated in inches unless otherwise indicated.