Approximately 21x21mm silver plated cast square picture-frame charms. 2.5-3.5mm top loop. 2.2mm thick. Fits approximately 14.5x14.5mm images. JBB Findings is internationally known as a manufacturer of quality jewelry findings & supplies. Many jewelry makers use these charms for bracelets. Overall dimensions do not include loop. Great for photos, paper, fabric, found objects, more! Seal images with Mod Podge® or Elmer's Glue-All® to prevent discoloration. Allow glue to dry completely before covering the images with resin or glaze.