Throwing a ball in the dark isn't an issue any longer. First, you have a ball that's rock solid compared to any tennis ball you've ever had. Second, you charge this ball up and it's good to glow for quite a while. Shazaam!
|Dog Size||Product Size|
|15-35 lbs||Medium2.5 inches in diameter|
|35-60 lbs||Medium2.5 inches in diameter|
|60-90 lbs||X-Large3.5 inches in diameter|
|90+ lbs||X-Large3.5 inches in diameter|