Materials: 18k gold plated brass, cubic zirconia Measurements: adjustable Gold Cubic Zirconia Open Birthstone Ring, Gold Open Ring With Cubic Zirconia Birthstone, Gold Cubic Zirconia Open Ring Birthstone, Gold Cubic Zirconia Birthstone Ring, Open Design, Tarnish Resistant Rose Gold Cubic Zirconia Ring, Gold Plated Crystal Ring With Vs Clarity For Promise, Adjustable Yellow Gold-plated Crystal Ring, Adjustable Yellow Gold Plated Crystal Ring, Adjustable Gold Plated Yellow Gold Crystal Ring