width: ***; height: ***;

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The width property specifies the width of an element, and the height property specifies the height of an element.

The width and height of the iframe can be specified by applying these properties to the IFRAME element.

iframe {
width: 300px;
height: 200px;

Property Value Explanation
width length, %, or auto the size of the width
height length, %, or auto the size of the height

The default is "auto".


<title>TAG index</title>

<style type="text/css">

iframe {
width: 250px;
height: 150px;



<p><iframe src="example.html">Alternate content</iframe></p>