CSS font-size em sample

by KELVIN LEE

HTML

This is default font size
<div class="content">
    <p class="em">This is 1.2em font size in content</p>
</div>
<div class="content">
    <div class="subcontent">
        <p class="em">This is 1.2em font size in sub-content</p>
    </div>
</div>

CSS

* {
    font-size: 14px;
}
.em {
    font-size: 1.2em;
}
.content, .subcontent {
    font-size: 1.2em;
}