This item is sold in singles. Our bison marrow bones come from family-owned and operated bison ranches throughout the American West. Marrow bones are a long-lasting chew perfect for cleaning teeth and gums and enriching minds. We slow-roast the bones to lock in nutrients and provide added flavor. Bones are available in approximately 3" and 6" sizes. Make sure to always choose a chew appropriate for your size of dog – bigger bones are always better. Always monitor your dog when they are chewing!