Bamboo Studio 13-1/4-Inch Round Tray, 2-Pack, Natural Color Includes 2 of our 13.25-inch round trays We use the outer bark or "sheath" of the bamboo plant, the sheath is collected, steamed, and pressed into shape No dyes are used to alter the color, the bamboo is as close to it's natural form as possible, further reducing envoronmental impact Microwave safe, disposable, may hand wash for extended uses (do not submerge in water), dry immediately after washing Please note that our trays are measured from edge to edge, there is a lip on the trays so please take this into account when deciding on size