The product is made of 925 sterling silver. for your ring size, use the "ring measurement chart" table. please send the letter stone and color you want in the "ask a question" section with your order number. (gold, silver, rose gold) our products are guaranteed for 2 (two) years. in case of any problem, you can send it to us with your warranty document. your purchased products will be shipped with a cleaning wipe, carefully packed box, bag and warranty certificate. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.