Font-size-adjust is the method of adjusting the font size in a matter that relates to the height of lowercase vs. uppercase letters. This makes it easier to set the size of fallback fonts.

Browser Support

This feature is currently only supported by Firefox.

Code Example

You can use font-size-adjust like this:

.adjust {
    font-size-adjust: 0.5;
}

More Information

More information can be found here.