10mm Tanzanite 2-Hole Crescent Czech Glass Beads. These flat Czech pressed glass beads have a uniform curved crescent shape, like a moon. This delicately curved bead is ideal for sculpting arches, wedges, and frames in your designs. It will be great for adding dimension to your beadwork or creating a curved frame around other beads. Measurements: 10mm x 4.5mm. The two holes will accommodate wire or cord up to 20 gauge thick, and are about 3mm apart (from center to center). Conveniently packed in 8 gram tubes, approximately 67 beads per tube.