How big should a hat really be?

[Ecuador Jim]

If the size is labeled s,m,l DO NOT BUY that hat!!!!Generic sizing says A HUGE amount about the quality and craftsmanship of the hat not just the size. Hope this helps.

...what HE said. Generic sizing allows for mass production, but unless you plan to put the hat through the ringer (I have such a hat), you probably want to steer clear.