1. A computer-implemented method for scaling an image of a user, the method comprising: generating, via a processor of a mobile device, two or more lines on a display of the mobile device; imaging the user with a camera of the mobile device, wherein the image of the user is displayed on the display of the mobile device; upon determining that a feature of the user aligns with a first of the two or more lines on the display of the mobile device, capturing, via the processor, the image of the user, wherein the capturing comprises automatically capturing, via the processor, the image of the user in response to the processor determining that the feature of the user aligns with the first of the two or more lines on the display of the mobile device; and determining, via the processor, a number of pixels per unit of distance based at least in part on: (i) a number of pixels between a predetermined point on the captured image and the feature of the user; and (ii) a predetermined distance between a camera of the mobile device and the first of the two or more lines on the display.