Give your dog a healthy and playful workout in the water with the skipping stones floating dog toy from Kurgo (and replace those slimy tennis balls you currently use). shaped just like real stones, you can skip them over the water as far as you can, wait for your dog to bring them back, and then repeat. They feature easy-to-spot colors and they float well even after a good chewing. They're also non-toxic and dishwasher safe. Sizing: Orange "Easy Rider" 4 W x 2.5 H x 1 D. Green "Fat Bob" 3.5 W x 2.75 H x 1.25 D. Purple "Tiny" 3.5 W x 2.5 H x 1" D. For supervised use only. The Kurgo Skipping Stones are fetch toys and arent designed to be chewed over long periods of time. Inspect product regularly for damage and discontinue use of the Skipping Stones if pieces begin to break off.