The Riptide Beanie is SUPER, SUPER, SUPER EASY. I mean, I knitted in a night if that goes to tell you something. It’s knitted with soft merino wool, my favorite type of animal fiber. Merino also allows lots of stretch. So when I sized it, I sized it for 2 sizes, Children and Teens/Adults. The length of the beanie is very customizable and easy to change. THANKS FOR KNITTING!