Formal Dress Shops has a wide variety of long prom dresses. Popular colors in long prom dresses black, white, gold, blue, green, burgundy, pink, & more. You can find long prom dresses with sleeves, off shoulder, cold shoulder, halter, or strapless. Long prom dresses in stock including plus size and affordable. Formal Dress Shops ships within 1 business day, so you get your long prom dress fast.