One set includes front shell, flat recessed metal back with dimple, mylar and self adhesive peel and stick magnet. Industry standard size, not for use in Badge-a-Minit Machines.
2.25 B.A.M. Self-Adhesive Magnet Set – American Button Machines
2.25 Pinback Button Set 5000 Sets by American Button Machines
Nice2Have 25 Sets of Fridge Magnet Button Parts 2.25 inch (58mm) - Button Maker Supplies for Button Maker Machine
2.25 Self-Adhesive Magnet Set – American Button Machines
2x2 Magnet Sets – American Button Machines
Magnet Sets – American Button Machines
2.25 Metal Bottle Opener Set - With Magnet and Optional Keyring
Magnet Sets – American Button Machines
3.5 Self-Adhesive Magnet Set – American Button Machines