If you have a Boot Barn in your area, they seem to have a good selection of hats. Some locations even have someone who can fit it for you.
Everyone's head is a little different. I got one of the wooden hat stretchers and shaped it to fit inside my best fitting hat. Now I have the perfect fit and all I need is my wife's clothes steamer to do the job. If I get a new hat from a good shop, I take it with me so they can make it fit right. I also use it to keep my hats from getting out of shape. If I make a leather hat some day, it will insure a good fit.
Good work on the wallet back. That's first class tooling.