Female size(cm): US 4 – Foot length 20 US 5 – Foot length 21 US 6 – Foot length 22 US 6.5 – Foot length 22.5 US 7.5 – Foot length 23.5 US 8.5 – Foot length 24.5 US 9 – Foot length 25 US 10 – Foot length 26 US 11 – Foot length 27 Male size(cm): US 6 – Foot length 24 US 7 – Foot length 25 US 7.5 – Foot length 25.5 US 8 – Foot length 26 US 8.5 – Foot length 26.5 US 9 – Foot length 27 After you place the order, please also email us your calf circumference. If you choose custom made, please email us your measurements: gender, shoe size, foot length, foot around, calf circumference.