First, let’s measure your head circumference! Take a sewing tape measure or a piece of string, and wrap it around your head, above the ears and across your eyebrows. Place a finger under the tape so you can account for a bit of room when you wear your hat. If you were using a piece of string, line it up against a measuring tape. Now you have your head circumference! Based on the chart below, look up your measurement and the corresponding cap size.