Stamping Foam are moldable foam pieces that are great for creating original and unique stamps. To use, heat foam with Heat It Craft Tool. Then, press foam into textured surface and hold in place for 5 to 10 seconds. Ink with Dye Ink Pads and stamp. The foam can be reheated and remolded to use over and over again. Includes 2 rectangle foams, both measuring 4.5x5.75 inches with a removable heart measuring 3.5x3.125 inches, all with a 20 mm depth.