Size of unordered glyphs

Clearly the size of ordered glyphs is set by font-family, but how about
unordered ones.

The issue of the size that the glyph on ordered list items seems to be
quite important - do they have height = font-size, height=x-height or what?

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From Matthew Brealey (http://members.tripod.co.uk/lawnet (for law)or http://members.tripod.co.uk/lawnet/WEBFRAME.HTM (for CSS))
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