The term scale or scaling means to increase or reduce the size of a pattern or shape. The goal of this step is to determine how big people want the finished piece to be and how many times people will need to multiply the sculpted positive to reach the desired size. It is sometimes possible to make the positive sculpt the same size as the finished piece. One way to determine the size of the finished object is by using a technique utilized by scenic artists and mural painters. The overhead projector has been used for years to project and enlarge small designs onto large, two-dimensional surfaces. Another method for determining visual scale involves freehand sketching of the final size. The big sketch does not need to be exact or as detailed as the design. This is only to get a sense of size. Capturing the mass of the object is the goal.