Da Vinci natural bamboo cutting boards are made of eco-friendly renewable natural bamboo that are naturally antibacterial, offering a durable and attractive cutting surface for all your kitchen applications. No dyes or stains are used in this cutting board so the natural bamboo color will not fade or wash out. Please note that this board is 11/16 inch thick, whereas most other bamboo cutting boards are only 3/8" thick. There are 2 methods of cutting bamboo for manufacturing a cutting board: Horizontal cut or vertical cut. Once cut, the pieces are then pressed together to make a solid board. Cutting boards that are made of vertically cut bamboo are much stronger and more durable than horizontally cut boards. All boards that are only 3/8" or 1/2" thick are made with horizontally cut bamboo, hence, they are cheaper. Horizontally cut bamboo can not be used to make thicker boards like our 11/16" thick board. The extra thick Da Vinci cutting boards are made with vertically cut bamboo making them considerably more durable than the competition. The board size is 18 x 12 inches. To care for bamboo wooden cutting boards, do not soak them in water, do not use a dish washer. After every few uses, rub some vegetable oil or olive oil with a paper towel all over the board to make sure water does not get in to warp the board.