Hat Size Chart
To work out your hat size
Wrap a tape measure around the widest part of your head (approximately one inch or two and half cm above your eyebrows). The tape measure should be placed around your head where the hat normally sits. Repeat the procedure to check the accuracy of your measurements. If your head size fits in between sizes, it is probably best to select the larger of the two sizes.
| METRIC | INCHES | ENGLISH | AMERICAN | |
| 48 | 19 | 5 7/8 | 6 | |
| 49 | 19 3/8 | 6 | 6 1/8 | |
| 50 | 19 3/4 | 6 1/8 | 6 1/4 | |
| 51 | 20 1/8 | 6 1/4 | 6 3/8 | |
| 52 | 20 1/2 | 6 3/8 | 6 1/2 | X-SMALL |
| 53 | 20 7/8 | 6 1/2 | 6 5/8 | |
| 54 | 21 1/4 | 6 5/8 | 6 3/4 | SMALL |
| 55 | 21 5/8 | 6 3/4 | 6 7/8 | |
| 56 | 22 | 6 7/8 | 7 | MEDIUM |
| 57 | 22 3/8 | 7 | 7 1/8 | |
| 58 | 22 3/4 | 7 1/8 | 7 1/4 | LARGE |
| 59 | 23 1/8 | 7 1/4 | 7 3/8 | |
| 60 | 23 1/2 | 7 3/8 | 7 1/2 | X-LARGE |
| 61 | 23 7/8 | 7 1/2 | 7 5/8 | |
| 62 | 24 1/4 | 7 5/8 | 7 3/4 | XX-LARGE |
| 63 | 24 5/8 | 7 3/4 | 7 7/8 | |
| 64 | 25 | 7 7/8 | 8 | |
| 65 | 25 3/8 | 8 | 8 1/4 |
Reference (Hat World)