S (6 7/8") M (7 1/8") L (6 7/8") XL (7 1/8")
Interior Circumference 19 7/8" 20 3/4" 21 5/8" 22 1/2"

 

Don't know your hat size? Here's how to find out. Wrap a cloth measuring tape or string around your head at the point at which your hat normally sits (~ 1/2" above your ear and across mid-forehead). Pull the tape or string tightly enough to get an accurate measurement, but not uncomfortably so. Take the measurement and match it to the next largest interior circumference listed above.