Here's a long a-line prom dress that is sure to set the tone for a beautiful evening. Crafted in wrinkle-resistant Mikado fabric from the plunging v-neckline to the hem, this beautiful evening gown is a great option for prom, galas, and military balls. In misses and some plus sizes, this long formal dress has a sparkly band at the waist that tops the long skirt that flows to the floor in an a-line shape. Affordably priced under $200, this long a-line prom dress is a classic style with modern details.