What an exciting combination of a bully stick and a bone! This is a bully stick that is tied at both ends to make it like a bone. The Bully Stick Bones are also fun for the dogs because they are a challenge for them as they try to untie the knots. They are about 5 to 7 inches in length, but untied are about 15 inches long. Like our other bully sticks, they are from free range, grass fed bulls and have a very low odor. The knotted bones do vary in thickness, they range from thin to standard. We use exclusively FREE-RANGE grass fed cattle in our Best Bully Sticks natural beef dog treats and dog chews. We believe that cattle should be free range and graze on grass rather than be cooped up in feedlots. In our opinion, this makes for a higher quality product the way that nature intended.