Font-
This is used to set the size of the font.
There are several options:
(1) Percentage, this sets the font size as a percentage of its parent element. So 100% is equal to its parent, 200% is twice as big etc.
(2) Length, this sets the font as a fixed size, normally in px, em, or cm.
(3) Size, options here are: xx-small, x-small, small, medium, large, x-large, xx-large.
(4) Smaller / Larger, sets the font to be a larger or smaller size than its parent element.
(5) Inherit, inherit the size from its parent element.