ZON Body Ball Free downloadable content includes: Breast Health Fitness Video, 101 Breast Cancer Facts, Self-Exam Guide, and "The Little Bright Book" by Bright Pink&reg; Anti-burst, non-slip material lets you concentrate on your workout. Package includes one inflatable fitness ball and a hand pump for fast, easy inflation. size: 65cm for user 56 and taller. The exercise ball should be large enough so that when you sit on it, your knees bend at a 90 degree angle.