Hat Sizing

Head Circumference
Adult Hat Size
Inches Centimeters Fitted Official Sizes One Size
21 1/4 54 6 3/4 S/M One Size Fits All
21 5/8 55 6 7/8
22 55.9 7
22 3/8 56.8 7 1/8
22 3/4 57.8 7 1/4 L/XL
23 1/8 58.7 7 3/8
23 1/2 59.7 7 1/2
23 7/8 60.6 7 5/8