IT Mill Toolkit components are sizeable; not in the sense that they were fairly large or that the number of the components and their features are sizeable, but in the sense that you can make them fairly large on the screen if you like. Or small, or whatever size. You can control the size of all components as well as layouts through the Sizeable interface extended by the Component interface. You can set the sizes of components as absolute pixel or point sizes or relative percentage or em values, as is possible for HTML elements generally.