Crowncap Hats Size Guide
| Centimeters | 49.5 | 50.5 | 52 to 53 | 54 to 55 | 56 to 57 | 58 to 59 | 60 to 61 | 62 to 63 | |
| Inches | 19 ½ | 19 7/8 | 20 ¼ to 20¾ | 21 to 21 5/8 | 21 ¾ to 22 ½ | 22 5/8 to 23 ¼ | 23 ½ to 24 | 24 1/8 to 24 ½ | |
| XS (xs and smaller is for kids) |
S | M | L | XL | 2XL | 3XL | |||
| 6 ¼ | 6 3/8 | 6 ½ to 6 5/8 | 6 ¾ to 6 7/8 | 7 to 7 1/8 | 7 ¼ to 7 3/8 | 7 ½ to 7 5/8 | 7 ¾ to 7 7/8 | 8 |
OSFM = one size fits most
Measure 1 inch above the ears and to the tip of the forehead
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HOW TO MEASURE YOUR HEAD

Measure around your head making sure the tape passes across the Centre of the forehead, above the ears and over the natural bump at the back of the head.
Don't have a measurement tape? Use a string around head, then measure it on a ruler.