<!DOCTYPE HTML> <style> div { font-size: 12px; width: 450px; line-height: 1.0 } p { -moz-transform-origin: 0 0; margin: 0; -moz-transform: scale(1.2); } </style> <!-- In a 450px container, the minimum font size at 15em per line is 30px. This means we map 0px-45px into 30px-45px, so 12px gets mapped to 34px. --> <div><p>Hello world</p></div>