Waistbands should be cut along the lengthwise grain of the fabric and reinforced with interfacing to prevent the waistband from rolling or stretching. Iron interfacing to the wrong side of the waistband piece. Fold under the seam allowance of the facing edge and press in place. Mark waistband and garment edges into quarters. With right sides together, pin remaining raw edge of waistband to garment edge matching quarter markings. Stitch the waistband in place along the seamline. Press the seam allowance toward the waistband. Fold the waistband in half, right sides together. Stitch across the narrow ends of the waistband. Trim the seam allowance and clip the corners. Turn right side out and press. Align the facing edge with the waistband.