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Giro Helmet Size Chart

Giro Helmet Size Chart

Superfit Helmet SizeSize (cm)Size (in)
XS47-5118.5-20
S52-55.520-21.75
M55.5-5921.75-23.25
L59-62.523.25-24.5
XL61-6524-25.5

The Large Quarter Bike Helmet is the following dimensions: Large: 23.25" - 24.35" / 59 - 61.5 cm
 
Universalfit Helmet SizeSize (cm)Size (in)
Toddler46-5018.25-19.75
Child50-5519.75-21.75
Youth55-5919.75-21.75
Adult54-6121.25-24
XL58-6522.75-25.75
 
YouthSize (cm)Size (in)
Small/Medium46-5018-19.75
Medium/Large50-5419.75-21.5
Toddler48-5218.75-20.5
  

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.