Our Anna ring features stacked cubic zirconia atop a gorgeous 18K gold plated band. Material: 18K Gold Plated Stainless Steel Cubic Zirconia Water & Tarnish Resistant, Hypoallergenic, Nickel Free Jewelry you can swim & sweat in Sizes: Size 6: 16.45mm diameter Size 7: 17.3mm diameter Size 8: 18.2mm diameter