Used double stranded worsted, two kinds of superwash wool but I forget the brands, just stuff that was hanging around in my stash. CO 72, did green & brown stripes (3x2). Took one day to knit :)
Size 10 needles. Or 9? I forget which needles, unfortunately. Probably size 10.

Inspired by http://www.ravelry.com/projects/firegirlpj/turn-a-square-2
and
http://www.ravelry.com/projects/djenn/turn-a-square

Honestly, turn a square is one of my fave hat patterns ever.