Tryit Editor v1.8

Source Code:

<!DOCTYPE html>
<html>
<head>
<style> 
div
{
width:100px;
height:100px;
background:red;
transition:width 2s, height 2s;
-webkit-transition:width 2s, height 2s, -webkit-transform 2s; /* Safari */
}

div:hover
{
width:200px;
height:200px;
transform:rotate(180deg);
-webkit-transform:rotate(180deg); /* Safari */
}
</style>
</head>
<body>

<p><b>Note:</b> This example does not work in Internet Explorer 9 and earlier versions.</p>

<div>Hover over me to see the transition effect!</div>

</body>
</html>

Result:

W3Schools.com - Try it yourself

Edit the code above and click "Submit Code" to see the result.