Sapphire template-is it possible to increase/decrease text only on entire page?

[vitsin]

Sapphire Layout: is it possible to increase/decrease the actual text of all page components without touching the size of components themselfs?
Say, there is a

with h5="Monthly Sales" and another with h5="Total Views" etc, so is there a way to increase/decrease the size of fonts for "Monthly Sales"? And to make such change applicable to any page?

thanks