Em & M’s
Posted July 30th, 2008 by BeauFlexibility in typography is important. It’s important for usuability, accessibility, and design. As I understand it, Em is a realitive unit and comes from the height of a capital ‘M’. Typically, default text size for 1 em is 16px…….therefore .75 em to a default textsize is equal to 12px.
This is a great article that goes more into detail:
http://www.alistapart.com/articles/howtosizetextincss/
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