posted 15 years ago
There is no single list of system-wide font sizes. Sometimes fonts are available in a few discrete sizes only (bitmapped fonts), but they're rare these days. Most fonts are PostScript, TrueType or OpenType fonts, all of which can be scaled to any desired size.
So unless you know that -for whichever font you need to display the sizes- only some sizes are available, you can happily display a long list of all the font sizes you want to support, and let the font renderer worry about displaying them.