Wide short sleeves create the prominent upper shape in this rear view. The shimmering surface extends over the upper arms and ends above a broad, clearly defined waist area. A long champagne-coloured skirt falls below, with folds at its top. Pinned-up hair and elongated earrings leave the back neckline open. The front neckline is not visible in this photograph, so that detail needs another view rather than an assumption from the back.
When trying a coat, do not judge the wide sleeves only from the front. Ask for a rear view after putting the outer garment on and taking it off again. Check whether the upper surface lies evenly or has been compressed inside the coat sleeves. Reaching towards a bag can help reveal the room actually needed during movement.
The clear waist and quiet long skirt also provide a proportion comparison. A shorter coat may show that boundary differently from a long outer layer; test both on the real outfit. The picture does not establish whether the upper section and skirt are separate garments. Use it for the visible outline and volume rather than as proof of construction.