Chaokele Kids Cute Shark Shape Design Safe Bike Helmet Material:PC Injection Moulded shell +EPS Polystyrene /Foam Color:Grey,Blue,Head size: 48~52cm,Head Width: 16cm Cute Cartoon Shark Design ,can let your child full of courage and energe,develop love for nature,passion Well padded and very comfortable,4 hole ventilation system,Help Child Keep Safe For More Sporting Perfect for many kind sports such as bicycle,Roller-Skating,scooter,Ties and adjusts easily