Our newest fitness and sensory tool is smaller than an exercise ball but provides some of the same benefits. Its rounded shape offers a unique balance challenge for core strengthening. The donut shape makes a guaranteed kid-pleaser for sensory play! In addition, the FitBALL Donut can also be used as a dynamic prop for mat exercises. Inflates easily with the FitBALL pump (sold separately). Packaged in a poly bag. Includes insert with sample exercises. Maximum inflation for the small FitBALL donut when stood up on its side, is 20".