Got the 36x48", which is a good size for my desk. One side is smooth and the other textured in an epidermis-like pattern. It comes rolled, but with instructions on how best to flatten it. After a few hours of it being extended and flattened with heavy objects, it was nice and flat. Was a bit surprised how quickly it flattened out, as it was a bit stiff when rolled. The only bad would be maybe the price, which was slightly higher than I'd like.