We purchased these as a joke, but the quality of these fish hats is surprisingly good. The size is adjustable with a velcro strap, they have a nice lining, and are made like a good quality hat.  Not to mention that they do what they were designed to do, make the wearer look like a complete doofus :)

We actually ended up buying 5 of these because we had so much fun giving them to family and friends.