Whitespaces

and zero width ​characters with buttons for copying to clipboard, short mnemonics and usage comments.

→ No-breaking, mnemonic
HTML, mobdev
Mnemonic
Mobdev
iOS & Android
Zero Width
Expands when fully justified like typical space. Used with languages without visible space between words. Not supported in Internet Explorer v.6 and earlier.
Doesn't produce any space and prohibits a line break at its position. Determines word borders for computer search, parsing, sorting, etc. Not a space ​character.
Classic
Minimal width.
Mostly 1/5 of type size, rarely 1/6.
Frequently similar to Thin Space. Not rendered in Safari, so there's a hack.
Typed with a keyboard space bar.
Normal-space width.
Type Size Share
1/6 of type size.
1/4 of type size.
1/3 of type size. Closest to normal space.
1/2 of type size.
Type size width.
For numbers
4/18 of type size. Used in math formulas.
Number width. Used for tables.
Misc
Dot width.
Hieroglyph width. Used in oriental languages.
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