What this baoding ball can offer you is that it allows you to move your fingers flexibly to keep them rolling over your hand, relaxing your stiff fingers after a long day at work. It is this baoding ball features that allows you to gather your thoughts while scrolling through it with your fingers, gradually clearing your mind, relieving tension and relaxing your brain. Having been made of resin materials, it is high quality and can be usesd for long time. The diameter of each ball is 5cm. It is suitable for skin care and hand massage for gift to friend, colleague, family and elder people. Item Name: Fitness Handball Material: Resin Features: Stylish, Tighten Muscle, Relieve Stress Size Details: Each Diameter: 5cm/1.97" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension differences due to different manual measurements. Package Includes: 1 Pair of Fitness Handball