font-size: 1.2em;
             
                font-size: x-small;
             
                 font-size: smaller;
              
                 font-size: 12px;
              
                 font-size: 80%;
xx-small, x-small, small, medium, large, x-large, xx-large, xxx-large Absolute-size keywords, based on the user's default font size (which is medium). larger, smaller Relative-size keywords. The font will be larger or smaller relative to the parent element's font size, roughly by the ratio used to separate the absolute-size keywords above. <length> A positive <length> value. For most font-relative units (such as em and ex), the font size is relative to the parent element's font size. For font-relative units that are root-based (such as rem), the font size is relative to the size of the font used by the <html> (root) element. <percentage> A positive <percentage> value, relative to the parent element's font size.