Recommended for ages 3-5; Fits head sizes 48-52cm True Fit, 1-Step Adjustment 4 vents CPSC 1203 Bike Compliant Pinch-Guard ensures pinch-free buckling 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