Proportion is a principle of art that refers to the relationship of the size of one element when compared to another. It is not about the overall size of an artwork, but rather the relationship of the sizes of two or more subjects or elements. Proportion is important in art because it affects the overall harmony and balance of a composition. It is a powerful tool for artists to create realistic drawings and paintings, emphasize elements, and communicate ideas. Proportion is used to compare sizes, shapes, and quantities of different elements within a composition. It can be used to make a composition appear more realistic or more stylized depending on the type of proportion used. Proportion can also be used to create a sense of scale and depth in an artwork.

Proportion is one of the principles of art, which are guidelines used with the elements of art to make a visual composition. The other principles of art include balance, unity, harmony, variety, rhythm, movement, repetition/pattern, and scale. The elements of art are color, value, shape, form, line, texture, and space.

In summary, proportion in art is a principle that refers to the relationship of the size of one element when compared to another. It is important for creating harmony and balance in a composition, and it can be used to create a sense of scale and depth. Proportion is one of the principles of art, which are guidelines used with the elements of art to make a visual composition.