I worked in fashion. All clothes fit differently. I would tell women as they got worried about a size that the mannequin wore different sizes. Somedays she was a 2 other days an 8 and it wasn't a question of too much cake...
Regardless, to me this woman is a larger, big boned woman, yes plus sized. If I were to gain weight to fit into the same size as her I would look FAT, she does not. Everyone carries weight differently and extra lbs on me are not flattering