I'm sorry if this is a trivial question.
I want to know how the size of the gnome icons in toolbars (see pic) is specified. Those icons for 'new', 'open', 'save', ... that are used in Nautilus or Gedit.
I just played around with the gtkrc of my theme, but I couldn't find any option there. Aren't the icons scaleable? Are there smaller icon sets available?