Size Selection: Size = Recommended foot length (cm): Size 28 =Foot length 17.6cm Size 29 =Foot length 18.4cm Size 30 =Foot length 19.4cm Size 31 =Foot length 20.0cm Size 32 =Foot length 20.8cm Size 33 =Foot length 21.2cm Size 34 =Foot length 22.0cm Size 35 =Foot length 22.5cm Size 36 =Foot length 23.0cm Size 37 =Foot length 23.5cm Size 38 =Foot length 24.0cm Size 39 =Foot length 24.5cm Size 40 =Foot length 25.0cm Note: Please measure the length of your feet, e.g. if your feet are 22.3cm, please select size 35. Measurement: Place your heel against a vertical wall, use a marker pen to draw the position of your toe farthest from the wall, and then use a ruler to measure the length of your foot.