change gtk-2 font only for specific application

I have changed general font size for gtk-2 applications by adding this to my gtkrc file: gtk-font-name = "Sans 16" this also affected the text size in the application "dock", or however it is called, in the panel: Now even the text "New Tab - Chromium" does not fit there anymore. Can I selectively only change the text size in the application dosck, while leaving the general gtk-2 test size ? I am using openbox and fbpanel.