fpoller

Allows for resizing of tag cloud font sizes from within the admin panel.
Gives two configuration options for the tag cloud
<ul>
<li>Smallest size</li>
<li>Largest size</li>
</ul>
and adjusts the font sizes accordingly.

Resize tag cloud

Allows for resizing of tag cloud font sizes from within the admin panel.

seosbg

This WordPress plugin allows you to change the size of basic HTML elements. Simply amazing and easy to use. 
To learn more about the Font Size plugin please see Plugin URI. See screenshot examples at http://seosthemes.com/font-size/

Font size plugin

Font Size is easy to use. Font Size WordPress plugin allows you to change the size of basic HTML elements.

Resize tag cloud vs Font Size