The Hat Jack not only actually works, but you will probably make your hat too big

[Skeptic]

@Medievalist

Excellent; I’m going to have to get one, and sand down the front to be slightly narrower than the back. Thanks!

I’d think you could make a better one pretty easily yourself, given your skill set… I’ve considered a hat “stretcher” but I’d mostly use it to keep wet hats from shrinking…