This ball gives back, and that's GOOD! 100% of the proceeds made by PlanetDog of the best-selling Orbee-Tuff® Glow for Good Ball go directly to thePlanet Dog Foundation, which funds the training, placement, and support ofdogs who are saving human lives. So that's good, right? But so is the factthat it is doggie-durable for all chewers, and it glows in the dark! Size:Small (64mm), Medium (75mm)