WTF Foot Protector Sizing

Measure length of foot and width of instep.

Size Shoe Size (US) Length (cm) Width (cm)
XS Size 3 - 5 25 10
S Size 6 - 7 26 10.5
M Size 8 - 9 26.5 11
L Size 10 - 11 27 11.5
XL Size 12 - 13 27.5 12