Bosu Soft Fitness Ball, 4 LB. with DVD 5 inch in Diameter and weighs 4 lbs, Easy to hold-soft to the touch Complements many exercises performed on the BOSU Balance Trainer, BOSUSport 50cm Balance Trainer, BOSU Elite, and BOSU Ballast Ball. Designed to be easily gripped in one hand Includes Total Body Workout DVD, featuring compound exercises for the hips, legs, arms, and core