global {only in the GTK+ GUI} Controls the size of toolbar icons. The possible values are: tiny Use tiny icons. small Use small icons (default). medium Use medium-sized icons. large Use large icons. huge Use even larger icons. giant Use very big icons. The exact dimensions in pixels of the various icon sizes depend on the current theme. Common dimensions are giant=48x48, huge=32x32, large=24x24, medium=24x24, small=20x20 and tiny=16x16.