Rockin Beads Brand, Stretch Cord Mix Floss Elastic, Approximately 0.8mm Diameter. Sold Per 100-yards (10 Colors 10 Yards Each) Cord, Stretch, Floss Elastic Approximately 0.8mm Diameter Sold Per 100-meter Spool, Approx 300 Feet. Colors can very 10 randum colors 10 yards each Rockin Beads (TM) Brand comes with Rockin Beads Size Gauge Card