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Giro Helmet Sizing Chart



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Superfit Helmet Size Size (cm) Size (in)
S 51-55 20-21.75
M 55-59 21.75-23.25
L 59-63 23.25-24.75

Universalfit Helmet Size Size (cm) Size (in)
Toddler 46-50 18.25-19.75
Youth 55-59 19.75-21.75
Adult 54-61 21.25-24
XL 58-65 22.75-25.75
  

Helmet sizing is determined by the distance around your head in centimeters.  Measure the circumference of your head just above your eyebrows to determine your correct helmet size.
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