These Natural Stone Health Balls are a contemporary design for a very traditional Chinese remedy. According to the Chinese traditional medical theory of Jingluo, the hand contains a network of channels that circulate vital energy. Acupuncture points are distributed along these channels. Rotating the smooth stone balls within our hand in a circular manner stimulates the acupuncture points, leading to better circulation (and unlocking vital energy). In China, it is common to see a person using the Health Balls while taking a walk. Our Natural Stone Health Balls are packaged in beautiful diamond patterned black silk box. The balls measure approximately 1.5 inches.