An en space is a space that takes up only half a point size, named after the typography unit of measurement en.
In HTML
In HTML, to insert an em space, use the HTML entity .
The size of a displayed em space may vary slightly according to the browser or device that renders the text.
Example
In the following sentence, word spacing is normal.
The quick brown fox jumped over the lazy dog.
In the following sentence, all spaces are en spaces.
The quick brown fox jumped over the lazy dog.
Em space, Font size, Typography terms
