Copilot said: Full satin lining, not including the brim, with an adjustable elastic strap for a comfortable fit, this hat features an embroidered ""Kin"" logo on the front and our motto, ""Keep It Naturally,"" embroidered on the back. It comes in two sizes: Average and X-Large. The Average size fits a head circumference of 23.23 inches and is great for smaller to medium-sized heads or those who wear low-volume styles like short hair, low puffs, or thin braids/locs. The X-Large size fits head circumferences from 23.5 inches to 26.4 inches and is ideal for larger heads or fuller hairstyles such as thick curls, braids, afros, or large locs. Note that the dad hats include an elastic strap for additional stretch. To choose the best size, measure the circumference of your head from near the top of your forehead and use this guide to determine your fit.