Why are Hat Sizes So Weird?
Most adult head sizes range between 6 ┬¥ and an 8.
ThatÔÇÖs a span of roughly 5 inches, a big difference. So how do people determine a hat size, and why does it seem to fall in such a narrow range of numbers?
The official way to get your hat size in the United States is to measure the circumfrence of your head to the nearest eighth of an inch. Then you divide by pi (3.14). This will give you your official hat size. Every increase in hat size is 4/10ths of an inch.
Store owner Martin Mann said that the smallest adult size hat Hats Plus carries is 6 5/8.
Referring to the largest hat size heÔÇÖs seen on a customer, manager Tod Canon said, ÔÇ£8 ┬╝ is the biggest weÔÇÖve seen here.ÔÇØ
Mann explained that when dress hats were more commonly worn, hatters made hats in sizes that better fit head shapes called ÔÇ£round,ÔÇØ ÔÇ£ovalÔÇØ and ÔÇ£long oval.ÔÇØ As not every head is shaped the same way, this provided better fits within the same measured size.
Just to make the matter more confusing, there is no universal hat sizing. In the United Kingdom, their sizes are one size smaller than ours. So if you walk into ChristieÔÇÖs to buy a bowler and tell the clerk youÔÇÖre looking for a 7 3/8, it wonÔÇÖt fit. HeÔÇÖll sell you a 7 ┬╝ that fits perfectly.
The French have their own system that designates sizes from zero to 9 ┬¢ . The rest of Europe tends to stick with simply measuring the circumference of your head in centimeters. That is why your City Sport cap (from Belgium) and your Borsalino fedora (from Italy) list their hat sizes in centimeters.