[XeTeX] selecting font size

[David J. Perry]

>(Could be memoir offers more.)

Indeed it does offer many more font size options.  My personal 
recommendation is to start learning memoir (it's a big, complicated thing) 
if you often need to produce documents with a complex layout.  The common 
LaTeX classes are pretty useless for that sort of thing.  Using memoir 
avoids the need to use a number of additional packages since complete 
control over things like headers, multiple columns, etc. is provided by the 
class.

David