How to Change Default Font Size of Posts/threads?

[Dardann]

Hi guys,
I have phpbb version 3.0.10 and i am using style subsilver2 I have a question about Changing the Default font size for posting threads


Example:

Tiny Font size = size=50 (i want to change it as Small Font Size = 8)
Small Font size = size=85 (i want to change it as Small Font Size = 10)
Normal Font size = size=120 (i want to change it as Normal Font Size = 14)
Large Font size = size=150 (i want to change it as Large Font Size = 18)
Huge Font size = size=200 (i want to change it as Huge Font Size = 24)