People with rectangle body shapes are often worried that their straight frames are difficult to style, but it's actually such a fun shape to dress. If you have a rectangle shape, most things look great on you: it’s just about getting the balance right. What is a rectangle body shape? The rectangle body shape isn't a particularly curvy shape. The shoulders and hips are almost the same width and the waist isn't very defined, which explains why it's referred to as the rectangle shape.