I went from a 3 x 4 to a 4 x 8 using the same bases underneath but used a larger table made from a 5/8" piece of plywood 4 x 8. Ordered my mat online...........self-healing, printed on both sides, one side is green and the other side is black. I added a strip of trim along the edge sticking up just enough to surround the mat itself not that it would move as it is heavy but I didn't know that beforehand. I'm very happy with mine.