Surprisingly under $150, this long formal prom dress is the perfect blend of upscale style and affordability. With a pleated corset-style bodice, this long special-occasion dress has thin shoulder straps that double before criss crossing the open back for the best fit. In misses and plus sizes, this gorgeous evening gown has a hip-skimming long mermaid skirt with a volumizing back godet that pools into an eye-catching train that follows behind. So pretty for prom, military balls, and other formal events, this stylish long prom dress is as figure-flattering as it is beautiful.