Box pleat

Pleats consist of folds on evenly spaced, marked lines that are secured at the topedge. The distance between the marked lines is called the pleat depth. For a box pleat, with wrong sides together, match the outer marked lines of the pleat and pin. Stitch along the marked line up to and slightly beyond the seamline. Press the pleat flat, centring the seamline evenly between the side folds of the pleat. To secure the stitching at the top of the pleat, stitch across the top of the pleats(above the seamline) in a semicircular line, beginning and ending at the sides of the pleat.