# Thin space

A thin space is a blank typographic unit equal to one-fifth (sometimes one-sixth) of an em wide. It 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: &#8201; &thinsp;). Unicode's U+202F narrow no-break space (HTML: &#8239;) is a non-breaking space with a width similar to that of the thin space.

In (La)TeX, a thin space is written as \thinspace, or \, in math mode.

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 is "thinnest" of all.