How to choose your Castelli socks size?
Sock sizes are based on shoe size. For optimal comfort, the sock should fit snugly on the foot, avoiding creases.
1 - Shoe Size: Use your usual shoe size (EU or US) as a reference to identify the correct size.
| Size | Shoe Size (EU) | Shoe Size (US) |
|---|---|---|
| S/M | 35 - 39 | 4 - 7 |
| L/XL | 40 - 43 | 8 - 10 |
| 2XL | 44 - 47 | 11 - 14 |