A trim made by folding a strip of bias-cut fabric over a piece of cord and sewing it into a seam. It leaves a raised, rounded line along the edge or join of a garment, upholstery, or accessory. It adds structural stiffness to edges and provides a contrasting visual outline.
Heard on the job
Baste the piping to the right side of the front panel before attaching the back, so the cord stays tight against the seam line.
Insider tip
Always cut the fabric strips for piping on the true bias so they can curve smoothly around corners without puckering.