Features: brand new and high quality Ergonomic Design for All Hands: Suitable for all age groups and fits well for all hand sizes. Portable and easy to fit in bag or pocket. You can get repetitions in while driving, at the office or anywhere! Fitness & Sport Enthusiasts: Strengthen your wrists, improve the dexterity of your fingers and increase the strength your hands can apply while reducing fatigue. Help balance your grip muscles and your expanding muscles. Rehabilitation & Preventionl: Great for rheumatoid arthritis, arthritis, carpal tunnel, tendonitis, tennis elbow and are on the way to recover from a fractured or broken wrist, or when you type, text or any other activities which use your gripping muscles. Strengthens Grip and Improves Dexterity: Hand exercise rings build strength in the fingers, hands, wrist and forearms. Varied activities, including crushing, pinching and extensions work to improve the dexterity of both the fingers and hands. Perfect for athletes, musicians and physical therapy patients. Specifications: Material: PU Weight: approx.40g Color: Blue/Yellow Round Diameter: approx.7cm/2.75in Round Size: approx.10x9cm/3.93x3.54in Oval Length: approx.9cm/3.54in Oval Size: approx.12x11cm/4.72x4.33in Oval Finger Diameter: 2.5cm/0.98in Quantity: 1Pc Package Includes: 1Pc x Finger Grip Ball note: Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!