Material | Copper size | Resize according to the ring circumference - * After the order is placed, it takes 3 to 5 days for the manual order to be delivered, and it is expected that the finished product will be received after about 1 week. Taiwan) *For customized adjustments, please note when ordering - * This product is made of metal copper, which will naturally oxidize with the humidity of the air, and the color will gradually become more stable. * Like the lustrous, you can use a copper oil or a soft toothbrush regularly to apply some toothpaste and light brush to achieve the lightening effect. * Always wear more to keep the jewelry smooth. If you remove the jewelry, please put it in a dry environment * Metal The material has a certain degree of ductility, please avoid excessive impact and concave folding to prevent jewelry deformation * Avoid wearing jewelry hot springs and bath