Well, what you're looking at since yesterday is your browser default. If you have your browser default set to something like Verdana, and are on Windows, it will display large. Check and make sure you're still having a problem, because that would be an unusual default setting. Clear your cache and reload a site page.
If you are still having a problem, you will want to go to your browser's Settings/Options and change the default font. If you're on IE, you probably want Arial or Calabri. If you're on Firefox, you can just change the default font size to something a bit smaller.
If you are still having a problem, you will want to go to your browser's Settings/Options and change the default font. If you're on IE, you probably want Arial or Calabri. If you're on Firefox, you can just change the default font size to something a bit smaller.