Measure size
Place the tape measure backwards around your head at forehead height above your eyebrows. The number of centimeters determined in this way gives you your hat size. As a guideline, a hat sits approximately 1 finger's width above the ears. Further down it sits on the ears and is too big, further up it becomes too small.
If you don't have a tape measure at hand, you can also put a non-stretchy band around your head and then measure it with a ruler. It's best to measure at least one more time.
When a hat is a little too big
There are hat cork inserts for this option. These are simply placed in the inner band of the hat - ideally on the back and this makes the hat approx. 1/2 size smaller.
Size Chart
Here is a table for international sizes:
| Size (in cm | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 |
| International | XS | S | S | M | M | L | L | XL | XL |
| US | 6 3/4 | 6 7/8 | 7 | 7 1/8 | 7 1/4 | 7 3/4 | 7 1/2 | 7 5/8 | 7 3/4 |
