The principles of design (PoD) guide the use of the elements of design during the creative process to enhance the user experience. They include balance, emphasis, movement, contrast and variety, proportion, and unity
Aren't the elements scale, proportion, unity, variety, rhythm, mass, shape, space, balance, volume, perspective, and depth? If so then I think this is using shape, proportion and maybe space because the lady is in front of the background.
