Hey there
I thought that it could be useful to have a picture or diagram to be able to compare every Arduino variant size, from the smallest freeform soldering one to the largest PCB possible for an Arduino compatible board.
If you're interested, just send me pictures of your boards with a scale, so that I can put up a page on the Playground
There is an index of all the different Arduino boards. Adding sizes to that sounds like a good idea. I'll try to copy over the information you collect on the playground.