i build theese boxes for a forniture my girl friend wanted. i cut them and put them together and she wanted to paint them so that was some great team work right there and i think the turn out was quite amazing.
basicly the idea was to have them all fit together in the end no matter how you would put them up on top of eachother
so i made the small ones 17.5cm x 35c
the medium ones 35cm x 35cm
then a single 47.5cm x 35cm
and a few 70cm x 35cm
in this way u would allways end up with the same hight.