@IHaveNeverLivedintheCastle , ok, I'll reword it. Models are petite, of large build and curvaceous. Clothes are never pinned or bulldog-clipped in photoshoots. Photos are never photoshopped.
If you are short(ish), you need to draw the eye downward. Midi hems do not draw the eye downwards, and neither do V-necks. Volume doesn't usually make things look wider. Gathers, pleats and ruching removes bulk.
The NC green dress will not add width to your shoulders, arms and bust, or to your bottom, and it will make you look taller. Not even the model looks like a little girl trying on her mum's dress.
If you look at what people in the public eye wear, none have a definite look that they stick to.