The tungsten ring is designed with inlaid Koa Wood . This combination of classic and modern styles fully displays the elegant and chic charm of the ring. The wedding ring is made of Jewelry-grade tungsten carbide , the ring is Durable, Scratch-proof , Waterproof and never rust. Never fade nor make skin turn green. Tungsten bands be the first choice as a substitute for precious metal wedding rings. The edge of the wedding ring is designed with a precision arc, is easy to wear and take off, and it can also prevent accumulation in the gap. Our rings are made with a standard US ring size.Please check your ring style and ring size before proceeding . If you are unsure of your ring size, it is recommended that you have your finger sized by jeweler.