I have made one that is too wide for place mats to go with it. I think in the future I would make one a little narrower so I could use place mats along the sides. Not sure on the length. Either long enough that I don't need place mats on the ends or short enough to accommodate them. As for a round table, I have been thinking this one over for my Mom. I guess the same thoughts would determine the size of this one also.