My overall experience using the item was underwhelming. The hats are very small. I think they'd fit teenagers and smaller women. I'm 6' 2 and the hat is really right on my head. So, i gave the hats away. Sucks because I really loved the designs.

Not sure if it's one size fits all, but it was a little tight on my bulbous noggin initially. Has since stretched a little to be comfortable.