Specifications: It provides resistance to hand, fingers and forearm and is pleasant to touch and return back to its original shape after each squeeze. It makes the fingers more active and relaxes your mind through the pressure points in your hand. You can use it for grip strength, dexterity, mobility, and fine/gross motor skills. Gel balls often are used in therapeutic settings to treat arthritis, repetitive motion injuries, stress and the effects of a stroke. This product comes in a universal, one size for all and can be used by both children and adults. Reduces stress and eases muscle tension. Item Name: Stress Ball Material: Silicone Features: Soft, Egg Shape, Strength Exercise Tool, Stress Relief Size: 4.5cm x 6cm/1.77" x 2.36" (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 difference due to different manual measurement. Package Includes: 1 x Stress Ball