Easy-to-Find Small/Mini Tennis Balls for Small Dogs and Puppies. Includes 12 Balls and a carrying bag. MINI SIZE - These balls are 1.9" in diameter, which make them perfect for smaller dogs. A regular size tennis ball is approximately 2.6" BRIGHT ORANGE – The bright, all-orange color that is much easier to locate in bushes and grass than the standard green tennis ball color DURABILITY - These mini dog tennis balls are 25% thicker than a regular tennis ball, which provides for extra durability for strong chewers BOUNCE - Even with thicker rubber walls these mini dog tennis balls still have a nice bounce to allow for fetching and playing.