<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns='http://www.w3.org/1999/xhtml' xml:lang='en'> <head> <title>font-size</title> <style rel='stylesheet' type='text/css'>span { background: pink; font-size: 75%;}span span { background: gold; font-size: 75%;} </style> </head> <body> <p> <span> This font size is 25% smaller than that of the <p> element.<br /> <span> This font is 25% smaller than the font used for the parent <span> element. </span> </span> </p> </body></html>