Shimmer and shine in this long sequin prom dress for your big formal. In misses and some plus sizes, this elegant long evening gown features allover sequins from the sweetheart neckline to the hem, while a corset bodice wraps around to the bands that lace up over the open back for the best fit. The sweetheart long sequin formal dress has a floor-length skirt that has a thigh-high side slit and a small train that provides the drama for prom, galas, and other formal events. This luxurious long sequin prom dress is one you'll be reaching for again and again because it looks like a million bucks but surprisingly costs less than $250.