Use simple icon -not combo- for FontSize

Hi everybody,

I was looking for a way to make CKEditor show the the FontSize information not with a combo but with a simple icon, just as it happens with the font color or bg color functions.

Please see attached a photoshoped version of the idea. It's quite the way gmail does it.


Is there any approach to get something like that? Any idea will be appreciated.

Thank you very much!