In CKEditor the Size determines how big or small a font used in the document text will be. The system administrator may customize the set of font sizes to the needs of a particular CKEditor installation, however, by default the following values are available:
72px. Depending on the needs of the system, font sizes may also be defined in a descriptive manner, like
Very small or
To change a font size for a text fragment, open the Size menu by clicking the button on the toolbar. The font size drop-down list contains a number of sizes that you can use. To make the choice easier, the items of the list are displayed in a font size that they represent, giving you a preview of what the text will look like.
A font size can be applied to the whole document, a paragraph, or a text fragment of arbitrary length — even a single letter. Do note, however, that for esthetic reasons it is recommended not to combine too many different font sizes in one document.