<html> <head> <style>p {background-color: #44b3c2;width: 150px;height:100px;padding: 25px;border: 25px solid #f1a94e;margin: 25px 0px;}</style> </head> <body><p>I'm the actual content.</p></body> </html> ]]>
Sweet! Including the paragraph's padding, borders and margins on every side, its total width is 300px; its total height is 200px.