I made this hat out of a worn out corduroy jacket. The hardest part was the bill because I had to sew a piece of plastic between the corduroy and the lining and keep everything straight and super tight. It turned out really nice for not having a pattern though. I'm proud of it. Here are some pictures--
From the front:
From the side:
Showing some of the lining:
Stitching on the bill (kinda sloppy looking, but it gives the rest of the hat the right shape):
I don't really know how to give a tutorial except by making another one and taking pictures along the way. So if anyone's heart is set on it, just let me know.