Bamboo 3-Piece Cutting Board Set Eco-Friendly Durable Ultimate Bamboo Each board is made of 100% extra organic bamboo, which is known for its strength, density, and high quality. This material is eco-friendly, free of any harmful chemicals o odors. The boards are available in three different sizes: Large (13 x 9.4), Medium (11 x 8.5), and Small (7.9 x 5.9). This set is perfect for whatever kind of food prep you are doing, whether it is cutting up meat or vegetables. Get more than one use out of these boards: they can double as serving trays!