The Kong Air Squeaker tennis ball combines two already well known dog play things, the tennis ball and the squeaker toy. These put together create the perfect fetch toy. These long lasting, high-quality Squeakair tennis balls will not wear down a dog's teeth since they are made with a special nonabrasive felt that is safe for your pooch's mouth, compared to the abrasive material on normal tennis balls. Perfect for games of fetch Squeaker to help encourage play Nonabrasive tennis material will not wear down your dog's teethThe ball sizes are: Large : 3", Medium 2. Read more…5", Small : 2", Extra Small : 1. 5"