Although called the short tank dress, this one is longer than knee lenght and will fall to about mid calf. The size small is 43" long at the center back. Picadilly knit is made of 95% Acetate and 5% Spandex to wash and dry easily. Absolutely will not wrinkle! Perfect for traveling or any time you want to arrive without a wrinkle. This fabric from Picadilly glides over the body and is similar to what other manufacturers call "Travel Knits". It never wrinkles and does not cling.