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I'm about to download the cm small caps package from CTAN. However there are quite a number of sfsc*.pfb files to choose from, where * refers to different numbers.

I wonder what these numbers mean?

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up vote 3 down vote accepted

The number indicate the font's design size.

You can rescale outlines of a font, but if you mix the same design at different sizes (say 10pt for the text, 12pt for paragraph titles and and 8pt for some lesser text) the result is usually odd looking or even illegible.

The best font sets have outlines designed separately at different sizes that can be used together without oddity.

For instance sfsc1200.pfb indicates a design size of 12pt and sfsc1440.pfb a design size of 14.40pt.

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Welcome to TeX.SX! You can have a look at our starter guide to familiarize yourself further with our format – texenthusiast Aug 7 '13 at 18:59
Thank you for the tip and for reformatting nicely my answer. It is not that important, but I would definitely not have put sizes between backquotes, since they are not code fragments—or are not intentionally code fragments. – Michael Grünewald Aug 10 '13 at 11:01

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