XXS: W's US shoe size 5.5 - 6.5
XS: W's US shoe size 7 - 8
S: W's US shoe size 8.5 - 9.5 / M's US shoe sizes 7 - 8
M: W's US shoe size 10 - 11 / M's US shoe sizes 8.5 - 9.5
L: W's US shoe size 11.5 - 12.5 / M's US shoe sizes 10 - 11
XL: M's US shoe sizes 11.5 - 12.5
XXL: M's US shoe sizes 13 - 14