I don't remember there being anything on the site that did that. However, as a rough rule of thumb, if you halve the size in one dimension, you halve the volume, and thus the cost. So, if you halve the size in all three dimensions, it will be 1/8th the cost. Double the size will cost 8x as much. It won't be exactly that as the cost includes postage etc (and minimum purchase price of $25), but that will give you a rough guide to how cost scales with size.
Last edited: Oct 27, 2008