This item is for 100 Mylar Only. It is 2.747 inches in diameter and is used to make 2-3/8 inch standard or 2-1/4 Badge-A-Minit buttons. The picture was taken with a stack of 20 or so mylar so it will show up in a picture. It is otherwise invisible.
Mylar are the thin plastic disks that cover and protect the graphics on buttons. Mylar always comes with "complete" button sets. You do not need to purchase this item unless you lost your mylar and need some more.
If you need complete button sets please click here.