New in Packaging. Glow in the Dark. Measures around 5-5.5 inches in diameter. Description from manufacturer: "Pet Safe Material: The giggle ball is made of PVC, it is non-toxic and harmless. The ball has a thick, strong inner wall. Glowing in the Dark: After being exposed to lite, the dog toy ball will glow in the dark. The ball's luminous time increases with the amount of time that it is exposed to light. Giggle Sound: The wobble giggle dog ball has 2 sound tubes. When the ball rolls, it will make a squeaking sound to attract your dog's attention. No battery is needed. My small dog just barks at this ball when it makes a sound and wants to have nothing to do with it! 😂