This Rhodium Platinum Open Curb Link Necklace is 7 mm wide and 20" long. This necklace looks absolutely like solid Rhodium Platinum one because it has several layers of pure Rhodium Platinum over a heart of semiprecious metal so your friends and family will never be able to tell the difference. The only difference is the cost! FREE LIFETIME GUARANTEE Each piece of jewelry in our store comes with a free lifetime replacement guarantee. It covers absolutely everything except for loss. If your chain ever fades, breaks or simply loses its shine please send it back to our manufacturers (along with the guarantee slip that you will receive with your order) to get a brand new replacement for unlimited times.