A long red dress with an opening shows why length and coverage are separate questions. The outer area reaches far down and spreads onto the floor at the side. At the same time, a higher front leg opening remains visible. Broader shoulder lines lead to a deeply indented upper edge, with pale reflections distributed over the dress. One leg is placed forwards, and a mirror edge shows part of the side area.
Compare the long outer outline with the paler more continuous version first. Do you mainly enjoy the length or this particular visible leg line? Try an actual candidate in a relaxed stance and then walking. Let the side area fall without rearranging it to assess its real position. The spread photograph shows only one possible stationary view.
Check the hem with the intended shoes. Ask about the actual construction if you want a different side extent. An extra visible area cannot confirm a removable component. Select neckline and reflective surface separately afterwards, so the length decision does not silently adopt every other pictured detail.