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 Pretty Rings Simple, Dainty Promise Rings, Jewelry For Girlfriend, Cute Promise Rings, Promise Rings Simple, Cute Ring, Pretty Jewelry Necklaces, Small Ring, Silver Heart Ring