Size Chart:
XS: US Women: 3.5-4 = Insole Length 8.89in = EU 34-35
S: US Women: 5.5-6.5/Men:5-5.5 = Insole Length 9.17in = EU 36-37
M: US Women: 7.5-8.5/Men:6.5-7.5 = Insole Length 9.65in = EU 38-39
L: US Women: 9.5-10.5/Men:8.5-9 = Insole Length 10.12in = EU 40-41
XL: US Women: 11-12/Men:9.5-10 = Insole Length 10.43in = EU 42-43
XXL: US Women: 13-14/Men:10.5-11 = Insole Length 11.06in = EU 44-45
XXXL: US Men:12-13 = Insole Length 11.38in = EU 46-47
XXXXL: US Men:13-14 = Insole Length 11.69in = EU 48-49