Recommended for ages 3-5; fits head sizes 48-52 cm True Fit, 1-Step Adjustment 4 vents Extended rear coverage provides extra protection CPSC 1203 Bike Compliant No adventure is too big, no pup too small when your little one is practicing riding with this Paw Patrol toddler helmet! Four vents keep little heads cool, and the helmet features extended rear coverage for added protection. Cute graphics with your kid's favorite pups, and sublimated webbing, make wearing safety gear fun. The True Fit system allows for a proper fit with a one step adjustment, so you and your little one can just buckle and go. Paw Pat