White is one hue known to add volume in areas where needed, however with these few tips, you are about to discover one hue that can work a slimming effect.
1) Conceal the bigger part of your body in proportion with a darker color.
2) Pair with a separate in a very bright hue
3) Try a white pleated skirt; Pleated skirts are known to conceal and add volume where necessary.
4) Wear slim stripes, or opposite proportions. Horizontal stripes for the smaller part of your body and Vertical stripes for the bigger part.