In the visual arts, shape is a flat, enclosed area of an artwork created through lines, textures, or colours, or an area enclosed by other shapes, such as triangles, circles, and squares.[1] Likewise, a form can refer to a three-dimensional composition or object within a three-dimensional composition.[2]
Specifically, it is an enclosed space, the boundaries of which are defined by other elements of art. Shapes are limited to two dimensions: length and width.