A Point is a unit of measurement, which equals 1/72 inch. It is not a 'Word' thing; it's an international standard. The finest point increment Word will work with for a font is 0.5pt. If you need something finer, you'll need to either:
a) use a PRINT field to generate the output (not for the faint-hearted); or
b) insert the content into the document as an embedded object which you can then re-scale to suit.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]