The Yoga Tune Up Therapy Balls are about  6.35 cm.(2 1/2")  in diameter each and are made of a special rubber that grips at your skin, grabs at multiple layers of muscles, and provides a deep tissue massage for your feet and all over your body.

The Yoga Tune Up® Therapy Balls with Tote set includes two massage balls and a mesh drawstring snug-grip tote bag.