The white short dress passes over one shoulder and leaves the opposite side bare. Folds gather at the waist, with the short lower edge running diagonally beneath. A longer area of fabric hangs at one side. Both white open strap shoes are visible and the legs are crossed. One hand is lower while the other sits further behind the hip. Fine pale jewellery accompanies the neck and hand areas. The photograph records the front line in this particular stance.
Its quieter surface provides a useful starting point when shape is your first question. Compare the direction of the upper edge separately from the lower diagonal. You can adopt either idea without selecting both. The image does not show a close connection for the side panel or any possible removal. Describe its visible placement rather than assigning a function.
Add a view of the actual candidate with parallel feet and relaxed arms. That reveals where the short border sits in ordinary standing. Try the intended undergarments and your own shoes on this precise dress. Pale colour alone establishes neither a fibre nor suitability for a particular invitation.