The long burgundy dress has fine shoulder connections and a softly shaped front upper edge. Its closer outline continues farther down before opening more distinctly in the lower area. Part of the lower edge rises at the left of the picture. One hand is at the hip holding the chain of a small darker bag, while the other stays low beside the thigh. The whole head and face are included, with long side-swept hair and a pale neck accessory adding to the frame. One open strap shoe is visible.
The side-raised area does not show a measured ordinary hem. Neither a fixed length nor a complete train can be derived from it. Those questions need a quiet stance with the entire rear continuation. The quieter red surface also establishes no particular fibre or maker.
Request the actual offer’s corresponding complete back and ordinary front. Compare length with your own shoes before expecting an alteration. Add the planned bag separately so that its carrying position is not mixed up with the course of the lower dress area.