You can select more than one.
If your bust, waist and hip measures sit close to each other, then you've got a straight or rectangle body shape.
This is where you want to define that waist and create an illusion of a waist. Look for any waist-defining pieces to break up the rectangle such as colour blocking styles, waist belts and cinched jackets. Have fun with your shape and add volume to your upper and lower body by wearing shoulder-building details such as a puff sleeve or oversized detail and a flared skirt or wide-leg pants to further accentuate your curves.