The S-One “Kid” helmet is a smaller helmet designed to fit smaller skaters between ages 2 to 11 (fits head sizes 18”to 20.5”). The Kid helmet fits low on the dome so it doesn’t fit high on your kid’s head and comes with extra sizing liners so you can easily get the perfect fit, and when your little skater grows you can replace the sizing liner with a thinner sizing liner. If you have any questions about fit, call the S-One offices and ask to talk to a helmet expert. Visit s-one.com or call (310) 464-8179.