The Crochet Guild of America will be making chemo hats as a chapter challenge in 2018. I was honored to be asked to create a hat pattern that may be used for this. This hat is written a bit smaller to ensure a snug, comfortable fit but instructions are included to make any size larger or smaller. Please visit http://www.crochet.org/ to learn more about the Crochet Guild or if you would like to join in on the chapter challenge.