Emsp

Emsp, or em space, is a whitespace character used in typography and digital typesetting. It has the width of the em unit, i.e., the current font size, so its width scales with the font. In Unicode it is U+2003 and named EM SPACE. It is one of several space characters, alongside en space (U+2002) and the regular space (U+0020). In HTML, emsp can be inserted as the named entity   or the numeric reference  . In most contexts on the web, whitespace is collapsed, so multiple em spaces may render as a single blank, limiting its usefulness for layout. The em space is therefore mainly used for typographic spacing in traditional typography or in preformatted blocks, rather than as a general layout tool.

The visual width of an em space depends on the font; in proportional fonts it is typically close to the width of the letter M, but exact measurements vary. Because 1 em equals the font size, the em space scales when font size changes. For consistent layout, designers usually prefer CSS margins, padding, or grid systems rather than inserting inline em spaces for spacing.

In summary, the em space is a font-relative typographic spacer encoded as Unicode U+2003 and accessible in HTML via  ; its rendered width is affected by font choice, context, and whitespace handling.