An en is half an em · 27 November 2001

An em is a sliding measurement corresponding directly to the point size of the type. It’s useful to remember the em quad, a frequent measure of indentations in body text: in 12 pt type, the em quad is 12 pts wide by 12 high, when using 18 pt type it is 18×18.

The point size of a typeface is measured from the top of its highest ascender (the peak of the tallest character) to the bottom of its lowest descender (that which hangs below the baseline).

An em dash is one em long, so in 10 pt text it measures 10 pts, but some sloppy font vendors dick around with that. The em is absolutely not the width of the capital letter M of its font.

Three-to-em spacing means introducing a third of an em of space between each word. Four-to-em is a fourth.

An en is half an em.

In another time, to prevent confusion on the phone and when hollering across the composition room, ems and ens were called, respectively, muttons and nuts.

Mike Nesmith wasn’t into a reunion tour; he’d moved on to other things.

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