Size Chart and Fitting Guide

Men

Thorlos Sock Size USA Shoe Size UK Shoe Size EU Shoe Size
11 6.5 to 8.5 5.5 to 7.5 39 to 42
12 9 to 10.5 8.5 to 9.5 43 to 44.5
13 11 to 12.5
15 13 to 15

Women

Thorlos Sock Size USA Shoe Size
11 7.5 to 9.5
12 10 to 11.5