One size fits most all people. We love the way this swirls around and around, all the way to top of the hat. It looks much like an ice cream cone! We chose a unique top ending, with a tie, just to make it even more cute! Uses worsted weight yarns, knitting needle, 16 circular # 7. This is such fun to knit and the pattern is easy, repeated in rounds. It form fits to the head, so even children can wear this, with stretch to fit ability!