Starrett generally gives those charts away - nice, but why buy one when there are so many freebies you can print off some internet site - just like the other one listed - which I made a copy JIC.

As far as scales, I must have a dozen from 2", metrics, and on up to a nice Starrett 36". Of course I can never find the one I was just using with the usual mess on my bench when I want it, which is the reason for so many.
I also have several tape measures, including one in decimal equivalents and one in metrics.

A vernier caliper, a 0 - 1 mic(other sizes can come later), a dial indicator and stand are also helpful. I am not a real big fan of digital readout measuring devices, but they do have a place tho not in my tool box .