The picture shows the ring width is 8mm Rings Width:4MM 6MM 8MM 10MM(If you want a width that is not in the options, please contact customer service, we will reply within 12 hours.) Us Size:5/5.5/6/6.5/7/7.5/8/8.5/9/9.5/ 10/10.5/11/11.5/12/12.5/13/13.5/14/14.5/15 Note: the character of the inside ring is "Tungsten carbide", which is deleted as default. If you stick to have it engraved on "tungsten carbide" inside of ring, please tell me and email to us when you have ordered. Hawaiian Koa Wood Inaly:The Hawaiian koa wood is inlaid into the ring surface, bringing you close to nature Material: Made of excellent tungsten carbide, durable and scratch-resistant. Craft: The inner surface & edge of this wedding ring are high polished and the exterior is brushed in a classic black. Free Ring Box: Each ring of us is packaged in a velvet ring box, help you store your ring when you don wear, and save your gift wrap fee when you purchased it as a gift. We have strict quality control and individual package for each ring. Tungsten Carbide Material In an extraordinary process, tungsten and carbide powers are forged together at 2,400 degrees Fahrenheit to form rings that are virtually indestructible and scratch proof. Our tungsten carbide rings offer the perfect combination of unbelievable strength with style and comfort. These rings will not fade, and the novel & fashionable style can attract the attention of others. The tungsten carbide ring represents the eternal. How to Clean Your ? Mix a few drops of mild soap with a cup of Tungsten Carbide Ringwarm water, soak the ring for a few minutes. Use the cloth buff away the tarnish. Rinse the black wedding rings in a stream of warm water, dry off it with a cotton cloth.