This hat was designed by me for my husband, using Cascade 220 superwash worsted weight yarn so that is nice and thick. It has skulls and stars in the pattern, with the decreases creating a twist! This is an electronic PDF pattern, best for intermediate-level knitters or at least done some fair isle before.
There are three sizes available with each repeat (10 sts) about 1.25”:
Small = approximately 18”
Medium = approximately 20”
Large = approximately 23.75”

The cast on uses the tubular cast-on that you can find on Knitty.com: http://knitty.com/ISSUEfall05/FEATfall05TT.html