Description: [Integrated]: The bike helmet for kids is Integrated designed, with high density PP foam, effectively disperses impact through pp deformation [Ventilated]: The kids bike helmet features 18 ventilated holes, ensuring breathability and preventing overheating during use [Material]: Made from quality PC shell and PP foam,lightweight and comfortable to reduce the burden on the neck during riding [Features]: The child bicycle helmet features a removable thickened chin pad with great sweat absorption ability and adjustable buckle for comfortable wearing [Applications]: The stylish children biking helmet is widely suitable for outdoor bicycling, skateboarding, balance bike biking, etc Specification: Material: PC Shell PP Size Chart: Head Circumference: 52 cm-58 cm/20.47 inch-22.83 inch Size: 26 cmx21 cmx14 cm/10.24 inchx8.27 inchx5.51 inch Package Includes: 1 Kids Bike Helmet Note: Please allow slightly errors 1-2cm differences due to manual measurement. Description: [Adjustable Fit]: The bike helmet for kids features an adjustable design to accommodate various head sizes, 20.87inch-22.83inch in Head Circumference, fit for children aged 3-11 years [Ventilated]: The Sport Helmet features ventilated holes, ensuring breathability and preventing overheating during use [Material]: Made from quality PC shell and EPS,lightweight and comfortable to reduce the burden on the neck during riding [Features]: The Cycling Safety Gear absorb shock and reduce impact damage [Applications]: The stylish children biking helmet is widely suitable for skating, outdoor bicycling, skateboarding, balance bike biking, etc Specification: Material: PC Shell EPS Size Chart: Head Circumference: 53cm-58cm/20.87inch-22.83inch length:30.8cm/12.13inch width:25.1cm/9.88inch height:14.5cm/5.71inch Package Includes: 1 Kids Bike Helmet Note: Please allow slightly errors 1-2cm differences due to manual measurement.