The rudraksha bead sizes we use most for stringing our jewelry are 6mm and 8mm beads. Depending on design, we also use smaller beads like the powerful and rare 4mm rudraksha beads, and also bigger sized beads like 9mm - 12mm beads, but found for the daily purposes they are used, 6mm and 8mm beads blend in and work well as jewelry, and are delicate enough for the tactile effort of counting beads in meditation without being tedious.