A set of three spiky porcupine massage balls of varying sizes, the small one is ideal for relieving tension in hands, feet, & forearms, the medium, for biceps, necks & calves, & the largest for backs, thighs & glutes. These versatile spiky balls have many uses, including deep tissue massage, & sensory stimulation for adults & kids with autism or sensory disorders, being brightly coloured & physically stimulating to touch, they're also a great stress ball for the office! For massage purposes the balls can be rolled under the feet to improve circulation, release calf muscle tension, & strengthen ankle joints. Get a friend to roll the ball against tight spots of your body, or do it yourself by standing against a wall with the ball in between. 3 pack of spiky massage balls Relieve tension in muscles Versatile, can used for muscle relief, sensory stimulation in Autism, trigger point therapy, Myofascial, Plantar Fasciitis, yoga, reflexology, stress ball, tight muscle recovery. Ball Sizes 6cm, 7cm, 10cm (Approx)