Dimension of the font size in UML diagrams

[Simon Siemens <simon siemens arcor de>]

Hi,

I am really happy that I can adjust the default fonts in the current Dia
version. There is only one thing I did not yet understand:

How can I transform a 10pt and a 8pt font size in the scale that is used
in the Dia dialog of UML diagrams. There font sizes are given as 1.0 and
0.8. What is the unit of these numbers? The style policy at my site is
that main text in figures should be 10pt and subordinate text 8pt.

Thanks for your help,

Simon