Material: High-Quality Solid 925 Sterling Silver (Nickel-Free and Lead-Free)Stones: Cubic ZirconiaColors: Silver and Gold Sizes: US 4.25, 5.25, 6, 6.5, 7, 7.75, 8.5, 9, 9.5, 10, 10.75, 11.25 (UK H1/2, K, L1/2, M1/2, N1/2, P, Q1/2, R1/2, S1/2, T1/2, V, W) or Open Back (Adjustable and Suitable for US Sizes 3-10)Size 4.25 = 15.1mm in Diameter or 47.4mm in Circumference Size 5.25 = 15.9mm in Diameter or 50.0mm in Circumference Size 6 = 16.5mm in Diameter or 51.9mm in Circumference Size 6.5 = 16.9mm Cute Promise Rings Girlfriends Gold, Small Promise Rings Simple, Minimal Rings Gold, Promise Rings For Her Silver, Promise Rings For Her Girlfriends, Simple Gold Ring Designs Unique, Promise Rings For Her Simple, Aesthetic Promise Rings, Simple Promise Rings For Her