Approximately 16x3.5x8 silver plated brass changeable necklace bails with post for hanging pendants. 9mm long, 1mm diameter posts. JBB Findings is internationally known as a manufacturer of quality jewelry findings & supplies. Bail fits up to 5.5mm cord. Great for Swarovski and other pendants with front-to-back hole alignment. Holes should be 1.2-3mm and no more than 5mm from top of pendant. Use French-wire keepers to secure drops on bail post.