Hand crafted.925 Sterling Silver Aztec Calendar Ring This ring comes in four sizes: 9, 10. 11 and 12. It weighs approximately 12.3 grams. The front sides measurements are approximately 20mm x 10mm. This exquisite ring is manufactured by us here in the USA with excellent standard of quality. 100% satisfaction guarantee or your money back. If you have any questions feel free to contact us.