Leather tricorne hats be very difficult ta come by, I have been in search of them fer over a year. Here are my limited supply. There are all hand made in the US. Leather tricorne hats are much more water resistant than wool felt ones, they are a bit heavier so they stay on yar head better in the wind n' are good fer cold weather.
Sizing: Use a tape measure around your head about one inch above your eye brow. Add 1/4 inch to yar measurement to allow for yar bandana & when yar head expands during the heat.