Proportion and scale are crucial because they maintain balance and harmony in celebrity homes. They ensure textures, furniture, and lighting coexist without crowding or feeling sparse. Too much or too little in scale disrupts the sensory balance celebrity designs achieve, making spaces feel unnatural or staged. Proper scale also helps layered lighting work effectively and creates calming, restorative rooms. Attention to size and placement turns materials and colors into a cohesive whole instead of disjointed elements, enhancing the grounded feel.