Mine is 4' x 8' using 2 bottom section bookcases with doors to hold my patterns and books. I added a piece of plywood the same size x 5/8 thick. Attached it with "L" brackets so it wouldn't move around then added another shelf halfway down for more storage where I keep my scrap bins, pre-cuts and jelly rolls on one side and my stabilizers on the other size. I added hooks at the ends to hold my longer rulers. My bolt of batting is hanging just above it so I can pull however much I need and cut it. I was able to find a cutting mat the same size...green on one side and black on the other, both sizes have markings on them.