Each cutting board in the 3-pc.stripe set has an attractive contrasting bamboo stripe inlaid in the board. They're only 3/8-inch thick, so they're easy to move and store. Bamboo is naturally anti-microbial and 16-percent harder than maple, yet is easy on your fine knives. Totally Bamboo uses organically grown Moso bamboo, so you need not worry about harmful pesticides or fertilizers. plus this bamboo is not a food source, or a habitat, for the Giant Panda. We recommend that you hand wash bamboo boards and occasionally use Bamboo Revitalizing Oil to extend the life and keep them looking beautiful. The small board measures 9" x 6.75" , the medium board 12" x 9", and the large board measures a substantial 15" x 11.5", sizes for every need in one set.