Bell Bike Candy Child Bike Helmet Complies with CPSC like and ASTM-1492 skate standards Hard-shell construction offers protection at the trails or skate park Twelve vents for a cool ride Side-squeeze buckle adjusts in a snap Complies with CPSC like and ASTM-1492 skate standards Fits head sizes: 51 - 54 cm&nbsp;&nbsp;20.125 inches - 21.25 inches