In order to measure your head to determine your correct hat size, you'll need a flexible cloth or soft plastic measuring tape. If you don't have one of these, a string or piece of yarn will work too!
If you are using a string, make sure you are following step 1 and 2, and then measure the start and end points against a ruler.
You can measure your head in inches or centimeters and reference your measurements against the chart below. Visit our Shipping & Returns page if you have any questions about returning a hat due to the size. You can also contact email@example.com if you have any further questions.