One-Shoulder Open-Back Long White Prom Dress 9030Stand out in this one shoulder long white prom dress that defines femininity without emptying your wallet. For under $200, you can slip into this exciting long white formal dress and feel like a million dollars at prom, military balls, and other black tie events. In misses and plus sizes, this long white evening gown has one single shoulder strap that leads to the open back, while the hip hugging long skirt has an alluring side slit that completes the