Weight - Relative darkness of the characters of a type font resulting from the relative thickness of the strokes-light, bold.

 Width - the distance from one side of a character to the other. Width can also be measured in "ems": which defines the proportion of a given letter's width and height with respect to the point size of a given font.

 Style - A distinctive appearance, typically determined by the principles according to which something is designed.

 Font - A set of type of one particular face and size.

 Typeface - In typography, a typeface is the artistic representation or interpretation of characters; it is the way the type looks.

X-Height – the height of a lowercase “x” in a typeface. Can impact a typeface’s “visual weight” and readability and therefore impact on the typesize that we choose.

Cap Height - refers to the height of a capital letter above the baseline for a particular typeface.

Leading - the vertical spacing between baselines.

Tracking - the spacing between letters in a line of text.

 How is type measured in inches, mm, points or picas?

Type is measured in points and picas which measure type size, line spacing, and column width.

Point - A unit of measurement for type sizes and spacing, which in the US and UK is one twelfth of a pica, or 0.013835 inch (0.351 mm), and in Europe is 0.015 inch (0.376 mm)

Pica - A size of letter in typewriting, with 10 characters to the inch (about 3.9 to the centimeter)

How many points in an inch?

72 points in 1 inch

 If a letter is set in 36 pts about how many inches tall is it?

0.4999 inches, about ½ inch

 How many picas in an inch?

1 inch = 6 PostScript pica

 How many points in a pica?

1 PostScript Pica = 12 PostScript points