I have self-healing cutting mats in a few different sizes. One of them is over 30 years old. I used it to help make the zine version of Boing Boing in the late 1980s. I still use it today. If you have never used a self-healing cutting mat, you don’t know what you are missing. You can make thousands of craft knife cuts and the mat will still look new. Amazon has them on sale now for cheap.