These hats are based on the Minecraft skins of Yogscast members Sips and Sjin. You can find them here:
http://www.youtube.com/user/YogscastSips
http://www.youtube.com/user/YogscastSjin

Needles: 5 US #6 / 4mm double pointed needles

Yarn: 25-50g light worsted weight / 8 ply yarn in each of the following colours- White, dark grey, light blue (Sips), light orange (Sjin)

Gauge: 22sts / 30 rows = 4 inches in stockinette stitch.