When choosing a size, please use the size chart. 19-12/20-12,5/21-13/22-13,5/23-14/24-14,5/25-15,5/26-16/27-16,5/28-17/29-17,5/30-18,5/31-19/32-19,5/33-20,5/34-21/35-22/36-22,5cm