Searching the web, I found many users have the same problem. Yesterday, when I was editing my eclipse.ini file, I found the problematic option that makes the fonts too small:
-Dorg.eclipse.swt.internal.carbon.smallFonts
So, if you have the same problem, you can edit $ECLIPSE_HOME » Eclipse.app » Contents » MacOS » eclipse.ini and remove the mentioned line of the options.

