Approximately 21x21mm silver plated pewter 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. These charms work wonderfully for giving designs an antique and vintage feel. 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.