[spirit_queen]

Not all hand-drawers can participate; a scanner is required for this, or at least a camera.

As for the dimensions, that won't do; the size of a document when scanned of photographed varies. The best we could hope for is to have contestants print out a scaled version of the base and then lightly trace the outline of the base onto another piece of paper and then draw the clothes, or sometyhing. This way, the drawing would be easy to resize.