Matubo SuperDuo beads are the authentic Czech Glass version of this popular bead. Measuring 2.5mm by 5mm and having 2 holes makes them perfect for creating interesting patterns and shapes in woven jewelry designs. SuperDuos are not just "coated crystal" but actual colored glass beads that are uniform in size and shape. Our SuperDuos are sold in economy packs of 50 grams. If you are new to working with SuperDuos, be sure to check out our free, downloadable projects using SuperDuos.