Rockin Beads 0.5mm Buffalo Leather Round Cord 25 Yards Black 0.5mm 25 yards Spool Black 1/2mm very thin Genuine Leather Cord Approx 0.5mm to 0.8mm diameters. Made from Buffalo Approx 0.0197 inch thick 25 Yard spool Rockin Beads (TM) brand