Sizes: XXS/XS (51-53), XS/S (54-56), S/M (56-58)
You can find chinguards on this link (it is not included in price of helmet).
All SHRED helmets exclusively incorporate the ICEdot identifier technology. ICEdot Identifiers work hand-in-hand with the ICEdot service to identify the athlete to first responders and notify his/her loved ones in case of emergency. The
ICEdot x Shred membership PIN is printed on the helmet, linking to a personal ICEdot x Shred online account with the athlete’s identification, medical info and emergency
contacts. This info can be accessed by any first responder with a cell phone. That might be a fellow boarder, skier or a trained paramedic, you never know.
A size 54 helmet corresponds to 54cm circumferance, a size 58 is 58cm, etc….
Remember that every head is different, so the tape measurement may not be as accurate as actually trying the helmet on. The shape of your head is not a perfect circle!