Principles of Design The principles of design are balance, symmetry, asymmetry, and radial symmetry. There is also unity, harmony, rhythm, repetition, gradation, contrast, transition, and radiation. Balance Balance helps give an interior a sense of equilibrium and ensures that the inside does not seem overwhelming. symmetry Symmetry is like having a mirror in front of you, with the two sides looking the same. It is best used in formal spaces, as using it too much in homes would make the space seem smaller. Asymmetry Asymmetry gives an interior a sense of openness. It is excellent for living rooms and kitchens, where people spend more time. Radial symmetry Sketch