Unicode Spaces
Space characters and “zero-width spaces” in Unicode
| Code | Name | Example | Width |
| U+0020 | SPACE | foo bar | Depends on font, typically 1/4 em, often adjusted |
| U+00A0 | NO-BREAK SPACE | foo bar | As a space, but often not adjusted |
| U+1680 | OGHAM SPACE MARK | foo bar | Unspecified; usually not really a space but a dash |
| U+180E | MONGOLIAN VOWEL SEPARATOR | foobar | 0 |
| U+2000 | EN QUAD | foo bar | 1 en (= 1/2 em) |
| U+2001 | EM QUAD | foo bar | 1 em (nominally, the height of the font) |
| U+2002 | EN SPACE (nut) | foo bar | 1 en (= 1/2 em) |
| U+2003 | EM SPACE (mutton) | foo bar | 1 em |
| U+2004 | THREE-PER-EM SPACE (thick space) | foo bar | 1/3 em |
| U+2005 | FOUR-PER-EM SPACE (mid space) | foo bar | 1/4 em |
| U+2006 | SIX-PER-EM SPACE | foo bar | 1/6 em |
| U+2007 | FIGURE SPACE | foo bar | “Tabular width”, the width of digits |
| U+2008 | PUNCTUATION SPACE | foo bar | The width of a period “.” |
| U+2009 | THIN SPACE | foo bar | 1/5 em (or sometimes 1/6 em) |
| U+200A | HAIR SPACE | foo bar | Narrower than THIN SPACE |
| U+200B | ZERO WIDTH SPACE | foobar | 0 |
| U+202F | NARROW NO-BREAK SPACE | foo bar | Narrower than NO-BREAK SPACE (or SPACE), “typically the width of a thin space or a mid space” |
| U+205F | MEDIUM MATHEMATICAL SPACE | foo bar | 4/18 em |
| U+3000 | IDEOGRAPHIC SPACE | foo bar | The width of ideographic (CJK) characters. |
| U+FEFF | ZERO WIDTH NO-BREAK SPACE | foobar | 0 |
Visible spaces
There are some graphic characters that can be used a symbols for a space. Though sometimes called visible spaces, they are not spaces at all but visible notations used to indicate the appearance of spaces in instruction manuals and descriptions of texts.
| U+2423 | OPEN BOX | ␣ |
| U+2422 | BLANK SYMBOL | ␢ |
| U+2420 | SYMBOL FOR SPACE | ␠ |
