[Size selection guideline] For the range 0 (16.5cm) to K (22.0cm), add 2cm to your usual shoe size. For the range L (22.5cm) to Q (24.5cm), choose your usual shoe size. If you add +1.5cm to the size, the size will often match. *If you have wide feet or high insteps, we recommend 0.5cm larger. *Since the satin fabric is hard and difficult to fit your feet, please choose a size larger than regular ballet shoes. As a guide, if the size is about 1.0 cm larger than the same Sansha shoes C4, the size will tend to fit.