Bamboo Placemat/Sushi Rolling Mat - Green, set of 4 Set of 4 bamboo placemats, as pictured. Each placemat measures approx 13" X 18.75" Bamboo is a highly renewable resource, and is ideal for kitchen products because it is natural, non-toxic, and durable. Placemats are constructed with round sticks of bamboo. These are similar in construction to sushi rolling mats, and may be used as such. Easy to maintain, just shake off over sink, and wipe with a damp cloth.