Kids: 4 - 6 Years: 16 inch 6 - 9 Years: 20 inch 8 - 13 Years: 24 inch Adults: 148 - 158 cm: XS 158 - 168 cm: S 168 - 178 cm: M 178 - 185 cm: L 185 - 193 cm: XL 193 - 198 cm: XXL
