How do you change the size of an HTML iframe?

---- iframe {width: 500px; height: 500px;} ---- That's the CSS code for changing an iFrame's width and height. Insert it in the page the iFrame's in, or wherever you put your CSS. If you don't use CSS, or it doesn't work, try this: ---- <iframe src='linktopage' width='500' height='500'></iframe> ---- ...And that's the code for defining the width and height of an iFrame within the iFrame tag.