The recognizable shape of an object or a space.

Form is the perception and shape of a room as well as any objects or elements in that room, including furniture, lighting, or built-in features. Anything that has three dimensions of height, width, and depth is considered form.

In an interior, there are two main classifications of form

Geometric These are objects whose form does not occur in nature. They are synthetic forms whose shape is described by hard lines and edges. Some geometric objects also are made of curvilinear elements and rounded forms. These shapes can appear softer and more relaxing. Often referred to as “Platonic solids,” these shapes include cubes, cylinders, and spheres.

Natural These shapes either naturally occur in organic matter, such as flowers and plants, or are inspired by patterns or shapes derived from or influenced by nature.

Designers must recognize the proportions and scale of a space and consider the forms being placed within it. The addition of forms of a similar shape or size can increase harmony and balance. Conversely, adding too many differing forms can cause visual confusion or dissonance. Interiors are typically more pleasing when a dominant form is repeated in various objects throughout the space.