WellieSTR (2 Rolls) White AND Black Elastic Thread 547 Yard Package 0.5mm Thickness 2 rolls White and black Elastic Thread, 547 Yard Package 0.5mm Thickness Create gathering, shirring or smocking on fabric using straight, zigzag or decorative stitching Length of a roll:approx. 500 M (547 Yard) Dia.(thickness):approx.0.5mm