According to the wiki's page on weapons and size, dwarves must meet a certain minimum body size before they are capable of wielding many weapon types. This has thrown an entirely new, unexpected level of complexity into forming a militia, as the only references to a dwarf's size I can find are limited to vague adjectives such as "large", "thin", or "massive".
How can I precisely determine the size of my dwarves so I can draft the most effective servicedwarves? I'm not averse to using external methods such as DFHack.