Get your own website Result Size: 625 x 565
x
 
<!DOCTYPE html>
<html>
<head>
<style>
/* Default CSS Values */
sub {
  vertical-align: sub;
  font-size: smaller;
}
</style>
</head>
<body>
<p>A sub element is displayed like this:</p>
<p>This text contains <sub>subscript text</sub></p>
<p>A customized sub element (changed "font-size"):</p>
<p>This text contains <sub style="font-size:25px;">subscript text</sub></p>
</body>
</html>