Magnetic Pendant Base - 1 Inch Circle, Sterling Silver Plated - Fits 1" Design Inserts and Button Magnets, All INTERCHANGEABLE; Fashion Jewelry Necklace Fits 1" inch magnetic design inserts (also called button magnets) that are INTERCHANGEABLE on the pendant base. The pendant is a high quality jewelry base with a sterling silver plated finish. MJB offers superior quality and fit compared to mass produced pendants sold elsewhere. Internal dimension of pendant bail is 4 mm wide x 6 mm high. By simply swapping out the magnetic design inserts, you can personalize your pendant to reflect what a cool and unique person you truly are! Design inserts can be purchased from many crafters or national retailers of magnetic jewelry. You can also make your own inserts by using a standard 1" button machine. For the best selection of design inserts: we recommend visiting: www.CliqueDesigns.etsy.com