<html>
<head>
<style>
h2 {
outline-style: solid;
outline-width: 15px;
}
div.a {
outline-style: solid;
outline-width: 15px;
}
div.b {
border: 2px solid red;
outline-style: solid;
outline-width: 15px;
}
</style>
</head>
<body>
<h1>The outline-width Property</h1>
<h2>A Heading with a 15 pixels thick outline</h2>
<br>
<div class="a">A div element with a 15 pixels thick outline.</div>
<br><br>
<div class="b">Notice that the outline is outside of any border.</div>
</body>
</html>