HOW TO MEASURE YOUR HEAD
Hat size is based on the circumference of the head. In order to determine your proper hat size, you must take a measurement of the circumference of your head.
Using a tape measure, measure your head about two centimeter above your eyebrows where your hat will rest. Be certain that the tape measure is straight, not twisted. Alternatively, you can use a piece of string to measure your head, and then measure the length of the string with a ruler. Be sure to measure twice for accuracy, if you are not certain about size, or are between sizes, buy the larger size.
Use the chart below to determine your hat size based on the measurement you take.
| General Size Hat | Metric Size |
| Extra small | 53 |
| Extra small | 54 |
| Small | 55 |
| Small | 56 |
| Medium | 57 |
| Medium | 58 |
| Large | 59 |
| Large | 60 |
| Extra large | 61 |
| Extra large | 62 |