The Nerf Dog Tire Squeak Ball will entertain your dog for hours on end, this durable ball comes in two sizes - Small meaures 6.35cm is suitable small-medium sized dogs, and medium meaures 7.6cm for medium to large size dogs. The durable rubber body stands up to extended chewing and makes an interactive squeaking sound that dogs love. Plus it has a ultra-grip tire tread texture that makes it easier to grip for both of you. Great for toss and fetch, or solo play sessions. NERF DOG toys include optimized design and function by introducing special materials for improved durability and performance.