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

[Medievalist]

@Skeptic

“Will it Stretch?”

Oy, I hate rule 34.

@beschizza

It stretches hats along a single axis, and you could plane down the wood to define the ideal ultimate oval shape you intend.

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

@Vanwall

dolichocephalic heads

I have learnt two new words today (the other one being scaphocephaly). Thank you also!