The font is called Courier. It is commonly produced in 12 pt.
There are 12 points to a pica.
(1 point = 1⁄72 inches = 25.4⁄72 mm = 0.3527 mm)
Courier has mostly been replaced by Courier New even in AutoCAD. It is a TrueType font.
A capitol is 3/32nds in height.
Line spacing is 7/64ths of an inch.
A lower case 's' is about 1/16th of an inch.