font-size-adjust CSS3 property allows you to specify the aspect value for a font. Browsers that support this property will adjust the x-height of a fallback font to match that of your desired font. By using this property you can ensure that font metrics are more consistent throughout a font-stack.
This tool calculates the aspect value for any font installed on your machine. Use this value as your
The above typeface will appear in Comic Sans if the font is not installed or is not recognised.