Luckily, there is a pattern on Ravelry --- everything is on Ravelry.
It's a pretty straight-forward pattern, and a lot of folks have made it with a lots of modifications, so it was just a matter of finding what would work for me.
For this hat, I cast on: 110 stitches, for a 22" head. My gauge is 6 stitches in 3x2 rib over 1" (ribbing is relaxed & not stretched out). I wanted it to fit over all of her hair.
I probably could have gone down to 100 stitches without issue given this gauge. The hat fits even with all my hair down. For a guy with close-cut hair, I think 100 would be just fine.
It worked up pretty well. I really liked the decreases.
I made it long enough so I could have a two inch brim.