Flat back cabochon, suitable for gluing into bezel settings, onto flat back bails, even directly on to fabric or paper. Affix these on top of a photo or other design for a framed effect. These beads have a magnifying effect when placed on top of images or words. Crystal clear glass cabochons magnify designs and patterns when placed on top of paper or fabric. Best used with earring, cuff link, ring and other flat-pad findings.Crystal clear glass cabochons' sizes as below 12mm=1/2 inchs 14mm=5/9 inchs 16mm=5/8 inchs 18mm=5/7 inchs 20mm=4/5 inchs 25mm=1 inchs 30mm=1 1/6 inchs 35mm=1 2/5 inchs 40mm=1 1/2 inchs