This has was fun to make. The finished hat will fit about a 19 inch head. If you wish to make it larger, you can go up to a size 3 needle. It takes 2 colors of fingering weight yarn. I used Knit Picks Comfy yarn as it is soft and my finished hat will be donated to Cancer/Chemo patients. But you can use any fingering yarn. I used about half a skein of each color to make this hat.