Tuffy's strives to create the world's "tuff"est softest dog toys. They created the "Tuff Scale" to give you insight on how tuff the toy you're buying compares against another. Some dogs are aggressive and can only have the tuffest toys ranked 8 and above. Other dogs may not be as aggressive or may be older and their chewing habits have slowed.Tuffy's goal is to help you purchase a toy suited for your dog's needs. All their toys are made with the same extreme durable construction, but the shape of the toy can impact a dog's ability to penetrate the toy over time.They are continually testing and creating new toys to be both stronger and safer for your dog. Indestructible is impossible, but they will keep trying!Rumble Rings measure 10" inches and are great for medium to large dogs. They rank a 9 on the Tuffy's Tuff Scale.Each toy's four layers of material are sewn together with two rows of linear stitching and two rows of cross stitching. The four rows of stitching are protected with a nylon webbing that are sewn three more times!Four Layers of MaterialTwo layers of 600 Denier nylon, one layer of PVC, and finally one layer of soft fleece. All four layers are rolled together and then sewn together four times in a one inch cross pattern to prevent layer separation.Protective WebbingAdditional industrial grade nylon webbing is sewn around the outside edge with three rows of stitching to cover and protect the first 4 rows of stitching.Squeaker Safety PocketsEach squeaker is safe and quiet because they are sewn into a nylon safety pocket beneath four other layers of material.Tuffy's Tuff ScaleThe cheap plush toyUsual cheap squeaking rubber toyFragile miniature Teacup Chihuahua strongFake knock-off sewn nylon toys that claim to be "rugged"Small dog tuffCreated for interactive playA really tough toy but still vulnerableLong lasting and really tuffExtremely Tuff - Extremely DurableMega Tuff - Without a doubt the Tuffest!