Medicine ball fits in the palm of the hand allowing you to move freely through a full range of motion during exercise, Add resistance to a variety of upper and lower body including crunches, rotational twists, and leg raises exercises or use in rehabilitation, Durable outer shell made of pliable PVC contains filler, Balls do not bounce and are not intended for throwing, Size: 61/2"" diam, 6 lbs, SKU: PWSS832