We've been discussing the origins of the em for a few days on this site. This article pulls them all together, along with references. And if you have a different memory or reference, you will have the opportunity to share your stories of typesetting or print design as well. The term 'em' is as old as moveable type and according to the best sources I can find (including the Oxford English Dictionary and the typography book Words Into Type among others), it originated from width of the capital letter M. But don't just believe me, review my references. And if you have a different memory, share your story.

More Help with Sizing Web Elements

• Origin of the Em
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Em Origins originally appeared on About.com Web Design / HTML on Friday, July 2nd, 2010 at 18:02:11.

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