Ok, bully sticks are made from bull penises. There, done, said. A bull's penis is generally 1.2” to 1.6” in diameter and 32” to 40” in length. We offer two different sizes (6” and 12”). Hands down... the single most popular chew in my shop. Dogs of all sizes love them. They are long lasting, protein rich, totally digestible with no odor. Each bully is a fantastic, tasty chew, bringing long lasting chewing pleasure to your dog while helping to reduce anxiety and keep your dog happy. One note of caution. Dogs like to grab it between their paws and settle in for a good chew. Watch your dog with the last little bit. Take it away if it looks like they will swallow it.