Are there recommended measurements for strokes

I'm learning Anniversary from the textbooks on the angelfishy site, and would be happy to have a millimetre measurement guide for strokes. I know some people write a bit smaller or bigger, but practically, I haven't actually seen any Gregg on paper, rather everything has been from the computer screen so my proportions could be a bit off.
I figure that if I buy a 5mm grid notebook than I'll be able to use these measurements pretty much on-the-fly to adjust my outlines.

(by michael_lisitsa for everyone)