One Industries Youth Helmets Size Chart

One Industries Youth Atom Labyrinth Helmet
Youth Helmets
Size Centimeter Inches Hat Size
Youth Small 47 - 48 18-3/4 - 19-5/8 5-7/8 - 6
Youth Medium 49 - 50 19-1/4 - 20 6-1/8 - 6-1/4
Youth Large 51 - 52 20-1/8 - 21 6-3/8 - 6-1/2

Sizing information is provided by the manufacturer and does not guarantee a perfect fit. Please use this chart as a guide only.