While reading this post, I thought of a 15 1/2 inch Rubbermaid turntable that my mother used to have in her refrigerator. It's at my house now, and I knew exactly where it was. I had been trying to think of a use for it, and couldn't bear to throw it out. LOL Now I'm going to find a board to fit the top of it and a mat that fits that. If I can't find the correct size mat, I may just use my table saw and cut up my old one to fit.