Shimmering beaded embellishments top this long halter mermaid prom dress for a look that is sure to wow the crowd. In misses and some plus sizes, this long formal dress features contrasting designs from the v-neckline to the knees, while thin halter straps attach at the back of the neck. The embellished long mermaid evening gown smooths over the hips before sheer-tulle ruffles flow in tiers down to the floor. Overflowing with eye-catching style, this long halter mermaid prom dress is surprisingly affordable, at under $150.