Zanies Mini Tennis Balls are sized just right for small dogs. Zanies Tennis Minis 6-Packs are back by popular demand. Set of six mini size tennis balls for dogs. These tennis ball dog toys are available in a variety of bright colors. Each tennis ball measures 2". Set of six balls in fashionable color combinations that stand out from the pack. The mini size is easy for small dogs to pick up. Set of six balls is packaged in a net bag with a hangtag.