【Premium Material】This stylish bicycle helmet for kids is made of quality EPS foam and PC board, featuring an integrated lightweight design. It offers great impact and shock protection, as well as cushioning effects. 【Ventilated & Comfortable Wear】The streamlined structure of this child bicycle helmet includes ventilation holes to keep the head fresh, ensuring comfort even when worn for extended periods. 【Adjustable】This children's bicycle helmet is designed with adjustable side straps and chin pads, suitable for a head circumference of 52cm-56cm/20.47inch-22.05inch. 【Lightweight & Compact】With its lightweight, breathable, and comfortable design that effectively reduces wind resistance, this kids cycling helmet ensures your child stays cool and comfortable during their ride. 【Wide Application】This fashionable kids bicycle helmet is ideal for outdoor activities such as cycling and skateboarding. Moreover, it makes an great gift choice for outdoor enthusiasts. Specification: Material: EPS Size Chart: 20cmx25cmx12cm/7.87inchx9.84inchx4.72inch Suitable for Head Circumference 52cm-56cm/20.47inch-22.05inch  Package Includes: 1 Kids Bike Helmet  Note: Please allow slightly errors due to manual measurement and different monitors.