A hefty weight and special grooves make this extra durable ball bounce in unpredictable directions, giving dogs more physical and mental exercise than a traditional ball. Like all Zogoflex dog toys, Jive is guaranteed safe, made in USA, 100% recyclable, non-toxic and dishwasher safe. The Mini Jive is about the size a golf ball, the small Jive is sized to fit standard ball throwers and the large ball is about the size of a softball. Chances are, this is the most durable ball money can buy.