20 mil - Custom thin magnet with 1- 3 square inches. Practical, inexpensive way to lure in potential customers. Customized with your companies information in either one color/ full-color, the cost is the same. Fundamental tool in any marketing tool kit and magnet monkey thin magnet are completely customizable and affordable. There is never a die charge for custom shape die. Magnet is a proven marketing tool, that has the lasting impression your company is looking and more.