Vintage Chic Knee Length Black Semi Formal Dress with Short Sleeves Square Neckline $72.9792 #HTX96003 SheProm.com Marsoni M251S Cocktail Short Formal Knee Length Dress Wisteria 4 Red Satin Multi Straps Knee Length Cocktail Dress Lisposa YWDJ Dresses for Women 2023 Wedding Guest Semi Formal Dresses Prom Cocktail Midi Wrap Vintage Lace Knee Length Short Sleeve Party Ballgown for Wedding Guest Evening Party Graduation Birthday Tea Party The Girlfriend's Guide to Cocktail Attire: A semi formal dress code for evening events, weddings, and upscale gatherings. Think: dressy but not stuffy. Cocktail attire has fewer rules than Black Tie and White