What are Matubo Beads? Matubo Czech glass seed beads are a pressed glass that competes with Japanese uniformity in size and shape, With A nearly zero percent defect rate. By pressing the glass they are able to get a Large hole and thinner walls that allows more thread passes and more room for creativity. Ideal for Kumihimo, macrame, bead embroidery, knitting and even wire work projects! Available in 59 colors and 3 sizes.