Material:Cubic Zirconia Main Stone: Zircon Shapepattern:Geometric Surface Width: 8mmRing Size Instructions: US size 4 = approximately 14.9mm in diameter US size 5 = about 15.7mm in diameter US size 6 = about 16.5mm in diameter US size 7 = about 17.3 mm in diameter US size 8 = about 18.1mm in diameter US size 9 = about 18.9 mm in diameter US size 10 = about 19.8mm in diameter US size 11 = approximately 20.6mm diameter US size 12 = about 21.4mm diameter US size 13 = about 22.3mm diameter Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!