13/16", 20mm diameter. One single hole. Great for stamping! Nunn Design's Patera findings are cast in pewter and plated with precious metals. All components are manufactured in the United States using the highest quality. Price for one blank pendant. ftscs-sb The above necklace uses Nunn Design Flat Tag Small Circle Pendant Antique Silver 1 Hole, Vintaj Artisan Copper Circle Blank Small, Lotus Design Stamp, and Nunn Design Copper Plated Textured Cable Chain - Small.