Rockin Beads Brand 80 Yards Light Brown Waxed Cotton Cord 2mm to 3mm for Bracelet/ Necklace 80 Meeter Light Brown Waxed Cotton Medium Stiffnes Approx 2mm to 3mm diameters.depending on spool 80 Yards 2mm to 3mm for Bracelet/ Necklace 80 Meeters Rockin Beads (TM) Brand comes with Rockin Beads Size Gauge Card