Giro Helmet Size Chart

To determine the correct helmet size, wrap a measuring tape around your head, keeping the tape just above the ears and level front to back.
 
Superfit Helmet Size Size (cm) Size (in)
XS 47-51 18.5-20
S 52-55.5 20-21.75
M 55.5-59 21.75-23.25
L 59-62.5 23.25-24.5
XL 61-65 24-25.5
*The Large Quarter Bike Helmet is the following dimensions: Large: 23.25" - 24.35" / 59 - 61.5 cm
 
Universal Fit Helmet Size Size (cm) Size (in)
Toddler 46-50 18.25-19.75
Youth 50-55 19.75-21.75
Adult 54-61 21.25-24
XL 58-65 22.75- 25.75
 
Youth Size (cm) Size (in) Youth Launch & Slingshot Size (cm)
S/M 46-50 18-19.75 XS/S 49-52
M/L 50-54 19.75-21.5 M/L 52-55.5
Toddler 48-52 18.75-20.5