Material: S925 silver Color :white gold, 18K gold SIZE: S Dimensions In-line diameter 2.5mm / inner diameter 10.9*5.8mm M Dimensions In-line diameter 2.7mm / inner diameter 25* 15.8mm tip?Gold-plated jewelry is usually worn to avoid bumps and rubbing against hard objects. Avoid contact with acidic substances, organic salts in sweat are also easy to use surface oxidation of jewelry Wipe it with alcohol and put it in place after wearing it. Careful care of the jewelry, can be used for a long time