Stacking Ring for Oura: The simulated diamond stacking ring fits oura ring perfectly, multiple ring sizes are available (size 5-10). Please refer to the sizing chart for your finger size (oura ring not included). Four Styles to Choose from: Hexasider has designed four styles of oura stacking rings, Green Diamond+Silver/Green Diamond+Gold/Pink Diamond+Silver/Pink Diamond+Gold, with stunning colorful diamond stacking finishes. You can choose the stacking ring of your choice. 14K Gold Plated Ring: The oura stacking ring has a 14K double gold plated finish for a long-lasting shine. Hypoallergenic, water-resistant, nickel-free, lead-free, unbreakable, lightweight and comfortable for all-day wear, it is ideal for everyday use and special occasions. Perfect Gift：This ring can add a touch of sophistication to any of your outfits whether you wear it alone or stack oura ring for wearing, it is a suitable and ideal gift for yourself or friends and loved ones. After-sales Service：We provide 24/7 friendly support. If you have any questions, please feel free to contact us.