Most people would consider the 1930s to be one of the most flattering eras of the 20th century, for women in especial.
Why is that, actually? It was a time of serious deprivation for many, as the Great Depression rolled along. But the clothes that were being constructed and worn are still, 80+ years later, lionized as some of the most well considered ever. The reasons are multiple.
The first and most important is that the clothing never forgot what the actual shape and proportions of a woman's body really were. The waistline was at its natural point. The bust, hips and shoulder-line were not exaggerated extremely. So a woman of any shape and size could be attractive in that clothing.