Weight: The overall thickness of the strokes, in relation to their height.
Width: How wide the letterforms in a typeface are in relation to their height.
Style: Can be divided into two categories: Serif and Sans Serif. The typefaces historical classification and the visual idiosyncrasies related to its historical text. Specific form variations that the designer has imposed on letters.
Type is measured in Points.
Point: Is the main units used to measure type. A point is 1/72 of an inch or .35 mm.
Pica: Is also used extensively in printing to measure type and is made up of 12 points or 1/6 an inch.
There are 72 points in an inch.
If a letter were set in 36 pts it would be ½ an inch tall.
There are 6 picas in an inch.
There are 12 points in a pica.
X-height: the distance between the baseline and the mean line in a typeface.
Cap height: The height of a capital letter above the baseline for a particular typeface.
Leading: The amount of added vertical spacing between lines of type.