Darn Tough size chart

Men Sizes

SIZE US UK EU
S 5.5-7.5 5–7 38–40/41
M 8-9.5 7.5–9 41–42/43
L 10-12 9.5–11.5 43–45
XL 12.5-14.5 12–14 46–49/50
XXL 15-17 14–16 50–53

Women Sizes

SIZE US UK EU
S 4.5-7 2.5–5 35–37/38
M 7.5-9.5 5–7 38–40/41
L 10-11.5 7.5–9 41–42/43

Kid Sizes

SIZE US
S 9-11.5
M 12-12.5
L 3-6