1. A computer-implemented method, comprising: receiving, from a computing device, an image of a person wearing an article of clothing, the article of clothing being in a worn state and having a contour marking representing an outline of the article of clothing, the article of clothing further having a fitting grid comprising a substantially symmetrical grid of a plurality of horizontal gridlines and vertical gridlines; determining a first relative position of at least one of the plurality of horizontal gridlines and at least one of the plurality of vertical gridlines of the article of clothing in an unworn state; determining a second relative position of at least one of the plurality of horizontal gridlines and at least one of the plurality of vertical gridlines of the article of clothing in the worn state, the first relative position and the second relative position corresponding to approximately the same location of the article of clothing; analyzing the image to determine a difference in the first relative position and the second relative position; receiving an indication of a selection of a prospective article of clothing; retrieving an image of the prospective article of clothing, the image indicated as capable of modification; determining a location in the image of the prospective article of clothing corresponding to the first relative position and the second relative position of the article of clothing; causing, at the location, a modification of the image of the prospective article of clothing, the modification of the image representing the difference in the first relative position and the second relative position and resulting in a modified image of the prospective article of clothing; causing the modified image of the prospective article of clothing to be displayed along with the image of the person, the modified image of the prospective article of clothing being positioned for display according to the contour marking to appear worn by the person; storing data representing the difference in the first relative position and the second relative position; and associating the data with a unique identifier.