All Atzi Hats hat tape are manufactured from top quality comfortable polyethylene foam.INSTALLATION DIRECTIONS: Cut a strip about 4-8 and place underneath sweatband inside your hat, you may need to place on either side or front and back ends of the hat depending on the shape of your hat and desired fit. Once it feels right you may remove the paper back of the tape and permanently install the hat tape.HAT SIZING TAPE: Foam hat tape with self-adhesive back to shrink hat size, can be used for fedoras, basecap, cowboy, western, panama hats or any other headwear with a sweatband.WARNING: It is best to not remove paper back so you can remove the tape later should your head grow, or hat shrink.DIMENSIONS: This strip of hat tape is 20MM wide*2 meters long*2MM thick. This should be more than enough for at least 2-3 hats or more.