This silicone sports rings are dishwasher safe and designed according to finger characteristic with safe material,ordorless and free from harmful substances.More suitable for modern active lifestyle. Rings made of silicone are more comfortable than metal rings, more suitable for everyday wear, suitable for different scenes like outdoor sports and exercises. Features - Color: Black. - Material: Silicone. - Size 7: 17.3mm/0.68inch(Diameter);54.3mm/2.14inch(Circumference). - Size 8: 18.1mm/0.71inch(Diameter);57.2mm/2.25inch(Circumference). - Size 9: 18.9mm/0.74inch(Diameter);59.5mm/2.34inch(Circumference). - Size 10: 19.8mm/0.78inch(Diameter);62.1mm/2.44inch(Circumference). - Size 11: 20.6mm/0.81inch(Diameter);64.6mm/2.54inch(Circumference). - Size 12: 21.4mm/0.84inch(Diameter);67.2mm/2.65inch(Circumference). - Size 13: 22.2mm/0.87inch(Diameter);69.7mm/2.74inch(Circumference). - Size 14: 23.0mm/0.91inch(Diameter);72.2mm/2.84inch(Circumference). - This product can help strengthen fingers with special part .Other colors can be according to requirements. - Also can improves finger dexterity and grip strength because of its considerate design struture according to . - Made from durable, resilient silicone for performance and easy to clean and take off. - Perfectly sized for grip strength training for both men and women that is odorless and latex free. - The nonslip rings are also tear and crack resistant for long-term use. Perfect for athletes, musicians and physical therapy patients. Package list: 1 x Silicone Finger Rings