The Zéphyr dress features a cute short skater skirt. You want to lengthen it? No problem!
Trace the skirt pattern piece (#6) in your size on a new sheet of tracing paper. With a ruler, extend the center and side lines of the desired amount. Use a sewing gauge to draw evenly spaced marks along the skirt’s hem, at the same distance. Connect those points to draw your new hem curve. Et voilà !