Google probably testing new layouts in Google search site, but header results are too big for me. I found the solution:
In Chrome: install StyleBot addOn and insert the css from http://stylebot.me/styles/5083
In Firefox: install Stylish addOn and insert the css from http://stylebot.me/styles/5083
If You prefere other font size than 16px and 14px, You can change font size as you wish.
Enjoy!
