Red Opal Czech Glass Rondelle Wafer Disc Beads 8mm Czech glass rondelle disc beads available in opaque, translucent, opal, swirl and metallic finishes. 8mm Czech glass discs are beautiful as spacers and dramatic strung on their own. Use a variety of colors together for fun accents on necklaces. Beads are packed loose, ready to use. Size and pack specifications: Beads are 8mm in diameter. Approximately 50 beads per pack.