Stetson Beaver Hat $1.50

I don't usually find much good stuff at the thrift-store Goodwill (and as I was typing this I asked Andrew how Goodwill is formatted, as he works there, and he said he didn't know-- which is fairly alarming, since one would think he knows if it's a capital W or a separate word, in which he then went to look, thus discovering his badge all in upper case and his shirt all in lower case which was not helpful at all]!) but have lately been doing well there.

Anyway, the hat is a vintage 3x Beaver Stetson which I got for $1.50 in like-new condition. Sadly, it doesn't fit my head. Just needs a bit of re-shaping.

What type of hat is this?