Fits head sizes 54 - 58 cm Adjustable dial at back of helmet for proper fit vented for cool comfort CPSC Compliant Ages 8+ R Exclusive, only available at Toys R Us Canada. Get ready to ride safely with this Ryde helmet! This Razor bike helmet is for ages 8+. It has vented holes to keep head nice and cool. Comes with adjustable dial at back of helmet for proper fit. There are soft foam pads on the inside of the helmet for a comfortable fit. The chin strap is adjustable and has a buckle lock to hold helmet in place. Fits head sizes 54-58cm. For warranty or part questions, please email service@stoneridgecycle.com