Medium 5/16" Basic Trim Lip Cord (Natural), Sold by The Yard , Style# 0516S Color: NATURAL - A2 Solid Color Cording with Lip (Flange) A medium 5/16" thick cording with a sheen The flange (or lip) on this cord is tucked into the seam during the construction process of sewing Diameter: 8mm (5/16") Made from Polyester Yarn with a Cotton Filler