Lulus Compelling Style Black Strapless A-Line Maxi Dress Wedding Party Prom NWOT. See all pictures for details. Shell: 95% Polyester, 5% Spandex. Contrast: 100% Polyester. Lining: 100% Polyester. Size M Pit to pit 18" Size L Pit to pit 20" length: Floor length. Measures approximately 54" from top to bottom. Wedding Guest Bridal Party Bridal Shower Bridesmaid Party Prom Homecoming Holiday Party Winter formal Formal Evening