Alpinestars Helmets Size Chart

Youth Off-Road Helmets
Size Head Circumference (cm) Head Circumference (in)
S 48 - 49 18.9" - 19.3"
M 50 - 51 19.7" - 20"
L 52 - 53 20.4" - 20.8"

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