This cotton piping cord is the same that we use for our pillows and slipcovers. It is a wonderful, soft cotton core with a thread wrapping. The cord has a pliable, soft density with enough firmness to add the necessary reinforcement to cushion edges. It washes beautifully after being sewn in. We stock three sizes: micro (1/16″), #00 (1/8″) and #02 (1/4″). Sold by the yard.