Salomon Helmet Size Chart

 
  Standard Sizing (CM) Adjustable Sizing (CM)
JR S   51 - 55
JR M   55 - 58
XXS 53-54  
XS 54-55  
S 55-56 53-56
M 57-58 56-59
L 58-59 59-62
XL 60-61  
XXL 61-62  
 
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.