The long pale dress has a shaped strapless upper edge and a gathered centre. A pale vertical inset appears in the upper front. Broad folds continue into a wide skirt with a higher front leg opening; rear cloth spreads onto the floor at the left of the image. A bouquet is held low beside the hip. The other arm goes behind, with its hand not clearly visible. The whole head and face are included, but the shoes remain hidden beneath or behind the cloth areas.
The low bouquet does not cover the neckline. You can therefore consider the visible upper shape separately from the side-held arrangement. Nevertheless, flowers do not establish an actual occasion or the identity of the dress. Its broader pale reflections also do not confirm a particular fibre or weave by themselves.
If this wider shape interests you, request closer views of the offered model’s gathered centre and lower finish with your intended shoes. Do not transfer the amount of rear cloth or an assumed material description to the copper-toned comparison. These are independent references with different forms and crops.