Review on 2 PCS X-Large 23.6"X15.7" Gartful Black Silicone Sheet For Resin Jewelry Casting Molds Mat - Premium Nonstick Reusable Placemat & Countertop Protector Multipurpose Mat. by Tammy Horner

I really like these mats. They're the perfect size for placing on your workbench to intercept epoxy spills or whatever. Oddly enough, I ordered the light gray mats and what I received was beige mats instead, which is even more odd when you realize beige isn't one of the color options (?) But I really don't care about the color, I just like it that they're so useful. As others have pointed out, one side of the mats is smooth and therefore sticky silicone with the other side having been scuffed up to provide a sort of felt-type surface texture. So, put the sticky side down on your workbench and work on things with the "felt" side up. I'm going to use one of the mats by cutting it up into many little nonskid feet for things, since the smooth side really does anchor things in place on your workbench.