Size: 20.5 - 22.0 inches (52 - 56 cm); Weight: 9.9 oz (280 g); Passed the Bicycle SG/Product Safety Standards; Recommended for elementary school students and above; Includes a dial-type buckle that can be adjusted according to the child’s growth; Lightweight model that is gentle for children; Use: in running play equipments like bicycle kick scooters, roller skates, skateboards, inline skates, unicycles, etc.