Jim's Store Kids Bike Helmet for 3-10 years old Helmet and Knee Pads Set Adjustable Elbow &Wrist Pads Protective Gear Set for Skateboard Scooter Cycling Roller Skating Boys GirlsValue for Money Kids helmet use high density EPS inner shell and ABS outer shell, provide effective protection. Head circumference (46cm 54cm 18. 1" 22"), suitable for 3 12 years old kids Comfortable Improve the use of more comfortable, dedicated projection care palm, and thicker sponge effectively protect the child Adjustable Size Multiple adjustable elastic straps for secure fit for various knee girths, free size fit most children 7 in 1 Kids Bike