Font characteristics
Character height =

                      -(Point Size * LOGPIXELSY)
   height = --------------------------
                         72

Weight - Stroke width, called weight - roman, regular, bold, thin, italic/oblique thickness of the character outlines relative to height
	■	Hairline
	■	Thin
	■	Ultra-light
	■	Extra-light
	■	Light
	■	Book
	■	Normal / regular / roman / plain
	■	Medium
	■	Demi-bold / semi-bold
	■	Bold
	■	Extra-bold / extra
	■	Heavy
	■	Black
	■	Extra-black
	■	Ultra-black / ultra
(normal, regular and plain)


Slope - Style, Angle - normal, roman or upright 

Width - Character Width - compressed, condensed or narrow. proportional or monospaced(fixed-width), (tabular) digits, 

Optimal size
Poster - larger than 72 point
Display - 19–72 point
Subhead - 14–18 point
(Regular) - 10–13 point
Small Text (SmText) - 8–10 point
Caption - 6–8 point

Metrics
Font metrics refers to metadata consisting of numeric values relating to size and space in the font overall, or in its individual glyphs. Font-wide metrics include cap height, x-height, ascender height, descender depth, and the font bounding box. 

Serifs