AVERAGE ADULT HEAD SIZES IN AUSTRALIA
According to Wikipedia, one study in the United States shows, the average adult head circumference to be 55cm (21 3⁄4 ) in females and 57cm (22 1⁄2 in) in males. Another study conducted in UK shows a slightly different result: with the average female head size being 55.2 cm and the average male head size being 57.2 cm.
This figure varies slightly different in Australia as well due to its different race/ethnicity mix. According to our experience in serving the Australian market, the average head size in Australia being 57cm for women and 58cm for men.
Head sizes can be different from person to person. Please make sure you measure your head size to ensure the best fit of your hats. For a comfortable fit, please purchase a hat which is 0.5 to 1cm larger than your head size.