You said 16 blocks in a block....how many in an inch?
Try these sites to create and download your own graph paper free. Of course you would have to be careful to get your scale correctly printed.
http://incompetech.com/graphpaper/
http://www.printfreegraphpaper.com/
http://www.paperprintout.com/paper/g...aper/index.php
Hope this helps.