I am very pleased with this hat, a replacement for a fishing hat which I finally had to admit had seen better days, but the product seems to be sized a bit large. I ordered a medium (my regular size) and find that the Dorfman rests on top of my ears. Rather than hassle with a return, I will be adding a foam liner to the interior band (an easy fix). The chin strap was one of the selling features since I am often in windy conditions.