Purchased this helmet for my 4 year old son (In LARGE). Seriously. Needed a helmet for scooter or biking and all of the skate style helmets fit him like a yarmulke (poorly - didn't go around his head, just fit on top). this helmet fit him great, went all around his head, is pretty stylee and doesn't 'shake' when he moves his head. Looks great too. I have a bern i use for snowboarding too which i like. Overall great helmet and good price on backcountry.