Every girl needs a long black formal dress, and this beautiful La Femme designer black dress is offered in plus sizes. Perfect for prom, formal wedding receptions, and other black-tie events, this plus-size long designer dress balances classic style and chic details. With a figure-flattering cross-banded midriff, this surplice v-neck evening gown smooths over the curves before the long skirt opens in a side slit and drapes to the floor. Long sleeves keep you warm on those chilly nights, so you can never go wrong when you slip into this plus-size long black formal dress from the designers at La Femme.