I have a normal sized head,hats and headbands normally fit!.This head band is loose.  For walking or liesure it holds just fine but I bought it specifically for running.  It slips right off as soon as I start to jog.  There are headbands that look just like this one but cost $15 and are available at most running shops and expo's that work great.  If your looking for a great running headband don't be cheap like me!  The write up for the headband says it's for keeping sweat out of your eyes I can honestly say I never got that far enough to sweat which is why i gave this product two stars.  On a positive note it is cute.