River Silks Crayon Collection - 4mm Silk Ribbons 20 Spools (5.5 yards each) of beautiful and durable 4mm 100% Hand Dyed Silk Ribbon Needlepointers can stitch with lengths of 4-6 feet without any fraying. Quilters can sew through the ribbon without any running. Perfect for Silk Ribbon Embroidery. Woven as ribbon with a barely perceptible selvedge which gives them incredible durability. Will not run or shred while you are using it because the thread count is so high.