size info EU 53 (ISO / International standard) - US 7 - JP 13 (Diameter = 17 mm) Thank you very much for seeing it. The arm finishes natural impression by leaving moderate unevenness and making it semi mat. Design that does not impair the cleanliness of the stone, it is recommended to overlay with other accessories. This is parallel sale with other stores. We always check inventory, but please understand that it may be sold out by time difference. We pay close attention to the production, but because of the one-by-one handmade, detailed details may differ from the photographs. Please understand that point in advance. Material: silver 950 / Amazonaite (from Xinjiang Uyghur) Size: No. 13 (not resizable) Non-returnable Plating processing is not applied for enjoying the original texture of the metal. If you want to avoid discoloration, it is effective if you gently wipe with a soft cloth after using it, store it in a bag with chuck, etc. and keep it with occasional dedicated cloth or polish powder. Please note that polishing powder does not adhere to the stone in that case. Although we are producing with consideration of strength, please be careful as we are making delicate. Since we are using natural stone it may have scratches or chips derived from nature. I hope you will enjoy it as the natural beauty of nature. When dropped or hit, please be careful when using and storing as it will cause scratches or chipping on stone. There is a risk of getting caught on clothes on design. Please be careful when used with delicate clothing. If you have any other requests, please feel free to contact us if you have any questions. <Prohibited matter> We reserve the right to refuse purchase for imitation by resale or sale purpose.