1. A computer-implemented method comprising: receiving, by an image generation system from a client computing device over a network, data regarding dimensions of a human subject; receiving, by the image generation system from the client computing device over the network, data regarding a garment to be displayed in conjunction with the human subject; generating, by the image generation system and based on the data regarding the dimensions of the human subject and the data regarding the garment, an image that includes a model of the human subject wearing the garment; and transmitting, by the image generation system, the image of the model of the human subject wearing the garment to the client computing device for display on a display screen in communication with the client computing device.