This ball is made from natural rubber with a built-in squeaker. Its size – 3.2 inches (8.1 cm) in diameter – is suitable for medium to large dogs (25–70 lbs / 11–32 kg). The grooved surface aids in dental cleaning and provides a better grip. It bounces unpredictably, making fetch more exciting. Use indoors, outdoors or even in water (floats). Clean with warm water. Not recommended for dogs that swallow small objects. Supervise during play.