[★ Material] Hand-made, international standard 925 sterling silver (hand-made electroless) [★ Size] Approximately 2cm wide (Be sure to confirm the correct size of the ring. If the size is found to be inappropriate after the production is completed, you need to modify it. You will need to charge an additional cost for the modification of the ring. ) Here's how to do it yourself: https://farm5.staticflickr.com/4563/38353099266_af048c072c_b.jpg [★ jewelry gloss] Trouble remarks "Louhua retro dyed black" or "glossy" https://farm5.staticflickr.com/4438/36918921330_68c49b3f75.jpg [★ Commodity Packaging] Fashion texture flannel small paper box, exquisite black small paper bag, chain storage bag, high-grade nano silver cloth, business card guarantee card (including material maintenance instructions) [★ Maintenance method] 1. Frequently worn, the body oil can provide protection to make the jewelry not easy to turn black. 2. If you do not wear for a long time, you can wipe it with a silver cloth and put it in a sealed bag. 3. Do not soak in hot springs, sea water, and chemicals to prevent sulfur from turning black. 4. Normally clean the toothbrush with toothpaste and brush gently, then wash the hair dryer with water and blow dry. [★ Warranty] Necklace warranty is limited to pendants. If there is any problem with the necklace, it can be sent back within seven days. We will replace it with a new product immediately. It can also be cleaned and maintained for free.