Juniors/Kids/Childrens 3D insole cut lines are noted, so you can adjust the size with scissors. The toe part is approximately 0.2 inches (5 mm), the arch is approximately 0.8 inches (2 cm), and the heel is approximately 0.4 inches (1 cm). The front side is cushioned and the back is slightly hard resin material. For size adjustment such as boots and boots. For flatfoot prevention, O-leg, X-leg, etc. Size XS: 7.5 - 9.1 inches (19 - 23 cm), S: 24 - 27 (15.5 - 17.5 cm), M: 11.0 - 12.2 inches (28 - 31 cm), L: 32 - 35 (20.5 - 23.5 cm).