Step up any kid's performance and style with the Giro Spur Helmet. Offering top notch protection, should your little one take a spill on the mountain, the Spur comes in plenty of fun colors to choose from to match the craziest patterns of kids outerwear out there. Super Cool Venting keeps a steady flow of air moving through the Spur to pull warm air and sweat through the vents at the back of the helmet to prevent overheating, while Giro's In Form Fit System allows you 6cm of adjustability to ensure a proper and safe fit. The Spur also has a seamless integration with Giro Chico and Rev Goggles for extra comfort and style. Seamless Compatibility with Giro Youth Goggles - The Buster and Chico kids goggles pair perfectly to cut out the wind and cold. In-Mold Construction - Reduces weight while providing incredible durability, ready to protect your child. In Form Fit System - This helmet adjusts up to 6cm to find the best fit for your child's head. Super Cool Vents - Pulls air through the helmet that keeps little ones' temperatures regulated. Youth XS - 48.5-52cm Youth Small - 52-55.5cm.