3'x8'...or so. I found a guy selling commercial exterior doors on Craigslist. They're something like 1.5" thick and the door handle hole has cords passing through it. Oh yeah, an electric pencil sharpener cord, too. I got a couple of those when my National Guard company got rid of them. Great for reference marks while cutting and kitbashing. The supports are a pair of 2-drawer file cabinets. One has hanging files in it to organize my Evergreen plastic sheet and strips. A file for each step up in size (.010", 015", .020", etc, then other shapes like half-round, tube, triangular, etc.) The work surface is a glass door from an old stereo cabinet. I don't know if those things are still made, but whenever I see one put out with the trash, I take it. I have 3 or 4 extras, and I've never broken one. Cleanup is a breeze; just use a razor to scrape off glue or paint. The flat surface is also great for getting things aligned, like making sure all 4 wheels are on the ground. No pictures...it looks like a bomb went off in there.
Oh yeah, I have a second one in the garage for the Sherline lathe and mill.