This pendant is made of stainless steel and is ion-plated* with 18k gold. This pendant is solid with a flat back. The size of the pendant is approximately 1.25 inches in height up to clasp, 1 inch wide and weighs approximately 2oz (including chain). This piece is available with a 22-inch necklace, which is 3mm thick. All orders are shipped with a branded velour pouch. *Ion plating is one of the most advanced surface finishing processes in the business. It makes gold plating more durable, more wear resistant, and has a higher brightness.