Very small font

[Paul]

I am brand new to linux and I just installed kubuntu 9.04 and I have extremely 
small fonts.  I changed the default size in the system settings and most KDE 
apps are looking OK but there is a lot of things that the font is too small to 
read,  I have a good computer and use a 32 inch Protron flat screen TV as my 
monitor.  The font size on Thunderbird is like  2 points, very unreadable.   I 
cannot find any options that change this.  Does anybody else know where to look 
so that I can change this? 

Thank you,
Paul