7 Best Navy Ball Gown that will sweep you off your feet! Navy ball 2015 Navy ball, Fashion, One shoulder formal dress One shoulder Navy Blue Sequined Evening Gown on Luulla Dark Navy One Shoulder Ball Gown Taffeta Prom Formal Dresses. A line, one shoulder gown with a detachable strap features shimmering beads. A versatile look which works for a wide range of events! Product Details Style #29194 Back zip Polyester lace on polyester lining Professionally clean Imported One shoulder strap is detachable Fit Information Fits slightly small, we recommend sizing up Bra friendly Fitted mermaid style Model is 5'9 wearing a size 4