Two Piece Mermaid Prom Dresses Lace Long Sleeves This two piece gown features a sculpted one shoulder ruched top paired with a flowing mermaid skirt that hugs the curves and flares into a dramatic train. The clean lines and rich color create a Lace Off Shoulder Mermaid Two Piece Prom Dresses Ashley Lauren 11646 Long Scuba Mermaid Dress Two Piece, One Shoulder, Ruched Crop Top, Open Back, Back Zipper, Horsehair Hem, Sweep Train 2