Draping Period Costumes
3. Drape the armhole seam and continue past the true side seam and up the back of the armhole for an inch or two. Drape the new SB seam down to the waist. Cut off the extra fabric one inch from the side seam, then cut off the extra fabric in an upward angle. Clip into the side seam at the waist.
4. Drape one pleat, one return, and one pleat toward the front. Cut off all but one inch of seam allowance.