The picture shows the ring width is 4mm and 6mm Rings Width:2MM 4MM 6MM 8MM 10MM 12MM(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. Material: Made of high quality tungsten carbide ring, durable and scratch-resistant. Design: two tone design--black high polished interior & matte silver brushed exterior, with a shiny white cubic zirconia is inlaid in the ring surface. Comfort Fit: This tungsten carbide ring is designed with a comfort fit inner surface face, which can give you a comfortable feeling when you wear it. Free Ring Box: Each ring of us is packaged in a velvet ring box, to help you store the ring when you don wear. Are you looking for a gift for anniversary, birthday or valentine's day? Now, this set of ring will be a perfect choice for you. They are modern, minimalist and simple to wear and go along with any outfit of your day. Specification: Gender:Men & Women Type:Comfort Fit Material:Tungsten Carbide Color:Black+Matte Silver Occasion:Wedding, engagement, anniversary, romantic date, graduation, dinner party, daily wearing Each ring with a ring box Clean Tips Mix a few drops of mild soap with a cup of warm water, soak the ring for a few minutes. Use the cloth buff away the tarnish. Rinse the ring in a stream of warm water, dry off it with a cotton cloth.