A black gala dress can be considered through this picture as a reader’s styling idea; no actual gala occasion is established. The long dark shape has a broad folded off-shoulder neckline with crossed-looking upper bands. A defined waist leads into a fuller skirt with a leg opening and trailing fabric. Long dark earrings accompany the open neckline. One hand is near the head and the other behind the body. The visible design relies more on its upper folded outline and continuous dark surface than on one large individual floral motif.
Begin with this quieter upper area if you want a definite dress without a large side flower. Try it with relaxed arms and the hairstyle you actually intend first. Add earrings afterwards, comparing how much open neckline space you want. A table place needs a seated fitting; a walk forwards needs the real hem handling with your shoes. Black alone does not establish dress-code suitability. Choose the form against the actual invitation and have any change to the broad upper edge explained directly on the offered garment.