I have one and am normally a medium in 661, Met and Giro. The Fox Flux s/m is slightly on the bigger side for me at the front. I have a pin head. Not sure this helps you.good spot cheers. anyone have any idea on sizing. would like to get one for the Useless Girlfriend but not sure whether to go xs/s or s/m and can't measure her head atm.
Poor useless girlfriend, will she get a right of reply here or tell us what she calls you...ha ha