Here's what other sites are saying:
Sizes: S(52-55cm), L(56-59cm)Full shell junior helmets have always been a staple for Boeri and this season is no exception. The Boeri Element brings size adjustability so the helmet grows with the user...a parent,s dream come true!Hard, multi impact shell. 2 shell sizes with size adjusting dial. Soft, plush liner. Jaw-piece compatible. Wt. 15.6 oz.