Piping Cord 3mm 3mm White Cotton Piping Cord, priced per metre. £0.40 Quantity: at £0.40 each Add To Basket 91 in stock. Pre-shrunk, cotton piping cord: white 3mm. Piping cord is multiple strands of cord twisted together. It has many applications, such as providing a core for covered edging on bags, cushions and other crafts and home decor items. Priced per metre, quantity ordered will be supplied as one continuous length.