Fits children approximately ages 2 to 5 years. Fits heads: 48cm to 52cm (18.9 In. to 22 In.). Well ventilated for extra comfort. Features True Fit, 1-step adjustment for a perfect fit every time and Pinch Guard buckle for no-pinch buckling. Extended rear helmet coverage for added protection. High-impact plastic outer shell for added durability and protection. Meets CPSC Bike Compliant standards. Helmet design may vary.