Embrace this time-honored remedy. In addition to relieving stress, Chinese Health Balls, also known as Baoding Balls are known to improve joints, blood circulation, sleep patterns, and memory. Two or more Baoding balls are rotated repetitively in the hand to improve manual dexterity and strength, and they are also said to assist in injury recovery. Each ball measures 1.5 inches in diameter and features the dragon design. Beautiful decorated box included.