1. A computer-implemented method for placing an image of a tangible item on an image of an appendage, the method comprising: under control of one or more computer systems configured with executable instructions, identifying appendage boundaries in the image of the appendage; determining an amount of at least one of a rotation, a scaling, and a translation to be applied to the image of the tangible item, the amount of the rotation, the scaling, and the translation based at least in part upon the identified appendage boundaries; transforming the image of the tangible item according to the determined amount of the at least one of the rotation, the scaling, and the translation; and merging the transformed image of the tangible item and the image of the appendage to generate a combined image, wherein the combined image appears to correspond to a physical item represented by the image of the tangible item actually applied to a physical appendage represented by the image of the appendage.