DAN SPEED Dog/Cat Interactive Roly-Poly Toy The diameter is from 4.5cm(1.7 inch) to 8cm(3 inch), the length is 12cm(4.7 inch), it's suitable for your puppy or kitten. A fun pet ball to keep your puppy or kitten mentally and physically stimulated! Adjust difficulty level as your puppy or kitten learns. Fill the ball with your puppy's or kitten's favorite treats or food. Quality and performance driven products for your pet Tested for safety and health. Rolls on the floor and treats spill out.