The Bandelier Hat Band is made of cut seed beads, leather, and sterling silver. It is adjustable to 1" longer or shorter than the size ordered*, so there's never a problem with fit.
first image shows the hatband on a Stetson Open Road hat size 6 7/8
(does not come with the hat)
*use a tape measure, or a string that you can then lay next to a stiff ruler, to measure the circumference of your hat above the brim where your hat band will fit