A scale model is a representation or copy of an object that is larger or smaller than the actual size of the object. Often the scale model is smaller than the original and used as a guide to making the object in full size.
Professional modelmakers create models for such professions as engineers who require them to test the likely performance of a particular design at an early stage of development without incurring the full expense of a full-sized prototype; architects who require architectural models to evaluate and sell the look of a new construction before it is built; filmmakers who require scale models of objects or sets that cannot be built in full size; salesmen who require scale models to promote new products such as heavy equipment and automobiles and other vehicles. Hobbyists or amateur modelmakers make die-cast models, injection molded, model railroads, remote control vehicles, wargaming and fantasy collectibles, model ships and ships in bottles for their own enjoyment.