HOW TO MEASURE YOUR HELMET SIZE
Use a soft tape measure to measure the circumference (around) your head.
If you don’t have a soft tape measure a piece of string or yarn is a good substitute, make sure to have a ruler or tape measure handy that is at least 24 inches or 2 ft. long.
Measure your head just above your eyebrows, make sure the tape or string is level from front to back.
Compare the measurement to the chart, if using a string check the length of the string with your ruler or tape measure.
EXAMPLE: Results showed a 56cm head circumference (around your head). Which makes for a 7 Hat Size.