Please according your Foot Length (cm) to Choose The Us size.The US size just for reference.We shipped the EUR size if your foot is thick or wide, we suggest you choose one size larger!!! Us Size 5 = 35= Foot Length (cm) 22.5cm Us Size 5.5= 36= Foot Length (cm) 23cm Us Size 6 =37== Foot Length (cm) 23.5cm Us Size 6.5=38= = Foot Length (cm) 24cm Us Size 7.5=39== Foot Length (cm) 24.5cm Us Size 8 =40 = Foot Length (cm) 25 cm