I saw this gist a few days ago:<p><a href="https://gist.github.com/ImJasonH/c00cdd7aece6945fb8ea" rel="nofollow">https://gist.github.com/ImJasonH/c00cdd7aece6945fb8ea</a><p>Not sure how less (or more) thorough it is.
The startling thing about this for me is seeing the "ch" CSS length unit. I've never seen it before!<p>For others in the same boat, 1ch is the width of the zero character '0'.