Thin space

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A thin space is a blank typographic unit equal to one-fifth (sometimes one-sixth) of an em wide. Not to be confused with a narrow no-break space. The narrow no-break space is often used as an unambiguous thousands separator. It is also used to add space to nested quotation marks.

In Unicode, thin space is encoded at U+2009 thin space (HTML   ·  ). Unicode's U+202F narrow no-break space is a non-breaking space with a width similar to that of the thin space. In HTML, a narrow non breaking space may be written as  .

In (La)TeX, a thin space is written as \thinspace. The narrow no-break space is \,.

In Microsoft Word and other word processors, within the symbol dialog (often available via Insert > Symbol or Insert > Special Characters), both the thin space and the narrow no-break space are available for point-and-click insertion. In Word's Symbol dialog, under font = "(normal text)", they are found in subset = "General Punctuation".

A hair space is even thinner than a thin space, while a zero width space has no width at all.

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