bbcode font-size semantics

[PinkMilk]

Currently vb uses <font> for bbcode font-size and so I'm trying to replace it with <span>

So far I've edited class_bbcode.php
Example (color):

PHP Code:

html' => '<font color="%2$s">%1$s</font>', 


to:

PHP Code:

html' => '<span style="color:%2$s;">%1$s</span>', 


and output seems fine except for font-size ...

PHP Code:

html' => '<font size="%2$s">%1$s</font>', 


to:

PHP Code:

html' => '<span style="font-size:%2$spx;">%1$s</span>', 


as it calls the old <font> sizes 1 - 7

so my question is where can I find where to change "default" font sizes 1 - 7 to say 10 - 20 (px)?