I had my son put two folding tables together with the rigiid foam insultion board on top because I could no longer crawl around on the floor/I think the foam board would work on a dining table also. They come in 4x8 foot sheets and could be cut easily to any size. I used duct tape to put two together. I like the foam boadr especially because I can pin my backing onto the board which holds it nicely. The foam board is easily taken on and off and csn be store an upright poition. My back thanks me for using it.Mary M