One size fit most. This hat is pretty easy, even if you have never done a lace pattern before. This lacey style is great for Spring, Summer, Fall, or anytime you want to look pretty! Make one for a friend too, as this hat will knit up in only a few days or less. Great style that will go with just about anything in your wardrobe! Use worsted weight yarn, knitting needles, one pair each # 6 and # 9