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 Small Promise Rings Simple, Cute Promise Rings Girlfriends Gold, Silver Rings For Women Stones, Promise Rings For Her Girlfriends, Promise Rings For Her Simple, Simple Promise Rings For Her, Cute Rings Gold, Gold Promise Rings For Her, Simple Promise Rings