I made this hat for a friend. I got this pattern from youtube. I have used puff stitch in this hat. I crocheted an extra round to increase the size as I felt the size given in the instruction will not fit an adult.
The visual instruction for this hat : http://www.youtube.com/watch?v=w8lLMHpt1Sw&feature=SeriesPlayList&p=203DB010F79C5E97