Darn Tough Socks
Men's Size Chart
| SOCK SIZE | MEN'S US | EURO | UK |
| XS | 2.5 - 5 | 35 - 38 | 2.5 - 4.5 |
| S | 5.5 - 7.5 | 38 - 40 | 5 - 7 |
| M | 8 - 9.5 | 41 - 42 | 7.5 - 9 |
| L | 10 - 12 | 43 - 45 | 9.5 - 11.5 |
| XL | 12.5 - 14.5 | 46 - 47 | 12 - 14 |
| XXL | 15 - 17 | 48 - 50 | 15 - 16 |
Women's Size Chart
| SOCK SIZE | WOMEN'S US | EURO | UK |
| S | 4.5 - 7 | 35 - 38 | 2.5 - 4.5 |
| M | 7.5 - 9.5 | 38 - 40 | 5 - 7 |
| L | 10 - 11.5 | 41 - 42 | 7.5 - 9 |