True Fit self-adjusts for a proper fit every time High-impact reflectors improve visibility 12 vents keep heads extra cool CPSC 1203 Bike compliant Fits head sizes 50 - 54 cm Take Minnie Mouse along for the ride! This great looking helmet is CPSC 1203 Bike compliant, and features high-impact reflectors for visibility and 12 vents for cooling. TrueFit, 1-step adjustment and PinchGuard buckling  make the helmet kid- and parent-friendly. For ages 5-8 (50-54 cm).