I bought an Alvin mat for draftsmen or quilting. They are marked like any cutting mat and are self healing. You can get them in clear or green, mine is clear. I have been using it heavily for over 6 months and it has yet to get scars from my rotary cutter. You can get them in different sizes and they aren't any mor expensive than the others. I find they are a heavier weight. I believe I bought it from Amazon.com.
Doris1334