Broad fine sleeve areas hang below bare shoulder tops and continue towards the hands. Narrower shoulder lines remain visible above them. Flowers and smaller pale points accompany the deeper front centre. A horizontal middle boundary separates a wider skirt below. Behind raised hair with loose front sections sits a separate pale piece. One hand rests on a surface at the side; the other side is only partly included. The crop ends before the full lower hem and shoes.
Keep three questions separate: the route of the narrow shoulder line, the width of the sleeve area and the piece behind the hair. Similar colouring does not establish a fixed connection between them. Nor does the photograph show which section might be supplied separately or removed.
For your fitting, start with that visible side area. Move both arms through the actions you expect to use, then inspect the same upper boundary again. Introduce a veil or hairpiece on the real dress afterwards. This helps describe a preferred broader sleeve effect without inventing a connection or completing the absent whole skirt from the crop.