The css-font-size data type
The css-font-size type includes the CSS font sizes used as an alternative to a numeric point size. In CSS these refer to an entry in a table of font sizes computed and kept by the user agent. The scaling is relative to the reference value of medium.
Allowed values
Base type:xs:token
| xx-small | Scaling factor guideline: 3/5 of medium. |
| x-small | Scaling factor guideline: 3/4 of medium. |
| small | Scaling factor guideline: 8/9 of medium. |
| medium | Scaling factor guideline: equal to medium. |
| large | Scaling factor guideline: 6/5 of medium. |
| x-large | Scaling factor guideline: 3/2 of medium. |
| xx-large | Scaling factor guideline: 2/1 of medium. |