There you go. A pirate hat. And here's a closeup of the Jolly Roger motif:
The hat is knit from the crown downwards, so there's no need for doing a gauge test. I recommend knitting with smaller needles than recommended on the ball bands, however, to get a fairly dense structure or else the Jolly Roger won't come out so well. Wool, for its blocking malleability, is also a firm recommendation.
There are quite a few special moves involved in knitting this, including an unusual decrease, some cabling, some creative stuff with elongated stitches, and the lace (yes, technically, it's a lace-esque structure) that makes the skull. Pirate knitters are known to be fearless, though, so it should not be a problem. Right, matey?
I will be writing up the pattern tomorrow - and then, then I will be looking for someone to test-knit it. If you'd like to do that, let me know in the comments or send me an email!