This Resistol black gold 20X cowboy hat features aprox. 3.75 inch hat brim depending on where measured. Resistol hats are known the world over for innovative western styling and the highest quality cowboy hats around. Resistol cowboy hats set the standard that. There is a size tag inside the hat and 6 1/2 20X Premium beaver Felt 6 1/2 size 3.90" Brim 5.5" Crown Cattleman's Crease Crown Made in the USA Use this chart to convert measurement to hat size: Use a cloth measuring tape to measure around the head, 1 inch above the eyebrows and 1/2 inch above the ears. The inch measurement equals hat size. 21 1/4" = 6 3/4, 21 5/8" = 6 7/8, 22" = 7, 22 3/8" = 7 1/8, 22 3/4" = 7 1/4, 23 1/8" = 7 3/8, 23 5/8" = 7 1/2, 24" = 7 5/8, 24 3/8" = 7 3/4