Sold exclusively at PromGirl, this long blue sequin prom dress is the definition of sparkly perfection. A sensational style for prom, pageants, and other formal events, this gorgeous long blue evening gown features allover sequins from the slightly curved neckline to the hem of the side-slit floor-length skirt. The glamorous long blue designer dress includes thin shoulder straps that double before criss crossing the open back and tying into a bow for a comfy fit. Bold, backless, and beautiful, this long blue sequin prom dress is offered in misses and plus sizes.