This is a rubber sheet, an essential item for leathercraft. It's indispensable as a backing for tools like diamond chisels, hole punches, and cutting dies, and also as a substitute for a cutting mat. With its moderate hardness and stickiness, it offers high workability and reduces stress on the blade. ◎Size Approximately 12 x 14 x 1.5 (cm) ※ Although referred to as a rubber sheet, it is made of resin, not rubber. ※ Size is approximate. There may be size variations and burrs due to manual cutting. I also have other leathercraft supplies for sale. If you'd like to purchase them together, I'm happy to discuss the price, so please take a look if you're interested. Leather tools are here ↓ #YLWorksLeatherTool #handmade #Leathercraft #leather #tools #punchingmat