To measure it correctly: Take a measuring tape. Find the part that protrudes the most at the back of your head and connect it to the most protruding part of your forehead using the measuring tape, leaving a gap of approximately 0.4-0.8 in (1-2 cm) above your ears. Complete the circumference and write down the result.

To measure your size before you buy your hat, wrap a tape measure around your head just above your ears and at the center of the forehead. The tape should fit comfortably – not too tight. Round up to the nearest size. You can also use a piece of string, and then measure it with a normal ruler.

Wrap the measuring tape or string around your head, positioning it mid-forehead, above your eyebrows and ears, and around the largest part of the back of your head. Make sure that your measuring tape is not below your eyebrows. Make sure the measuring tape is level and snug, but not too tight, then take the measurement in centimeters or inches.

To measure your head circumference, take a sewing measuring tape or even a string, and wrap around above the ears and across your eyebrows. Please stick your finger under the tape so there is a little room and there you have head circumference! If you fall between measurements go for the next size up.