Recover faster to dance harder! The Mad Ally Massage Ball works well to remove pain & tension in the calves, hamstrings, hips, glutes, pecs, obliques, shoulder, upper back, feet and arms. Small & transportable to throw into your dance bag so you can loosen up tight hips and stretch your feet and arches before and after intense classes. The textured surface helps to keep the ball in place but is still easy to manuver into position. 7cm diameter. Use it in conjunction with the Mad Ally Textured Foam Roller to ensure you keep a strong healthy and flexible body.