Mine is not quite a "block" of wood. I cut a piece of 3/8 sheet of russian plywood 12 X 16 inches. Rounded the edges. Stuck a piece of "dark marble design" Arborite (Counter top) on top of it and used a router for finishing. I like a big sturdy mouse mat that i can put on my lap while gaming. I find it more relaxing. The "marble pattern" is very mouse friendly too.