Final Sale Plus Size One Shoulder Dress in Black and Turquoise Floral Black One Shoulder Dress for Women Shop Now Plum and Peaches Plus Black One Shoulder Double Strap Midi Dress Plus Size PLT IRE Dresses Plus Size Luxe Black One Shoulder Glitter Dress Poshmark. Black Plus Size One Shoulder Dress is crafted from a cotton elastane blend for a comfortable and sleek fit. It features a one shoulder neckline, puff long sleeve, solid design, bodycon sheath silhouette, and a stylish side slit in a maxi length. Perfect for making a bold yet elegant statement. Note: The product color may vary slightly due to photographic lighting conditions.