Relative size refers to the comparison of the size of one object to another. It helps us understand how large or small something is in relation to something else. For example, when we say that a cat is smaller than a dog, we are using relative size to describe their dimensions. This concept is often used in various fields, such as art and science. In art, artists may use relative size to create depth and perspective, making objects appear closer or farther away. In science, relative size can help in understanding the scale of celestial bodies, like comparing the size of Earth to that of Jupiter.