The following code shows how to mark Copy icon.
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" type="text/css"
href="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.2.2/css/bootstrap.no-icons.min.css">
<link rel="stylesheet" type="text/css"
href="http://netdna.bootstrapcdn.com/font-awesome/3.0.2/css/font-awesome.css">
<style type='text/css'>
.label {<!-- w w w . jav a 2 s . c om-->
letter-spacing: 1px;
font-size: 24px;
line-height: 24px;
font-weight: lighter;
border: 1px white dashed;
}
.btn {
vertical-align: top
}
</style>
</head>
<body>
<span class="label label-warning">helloworld</span>
<a href="#" class="btn btn-medium">
<i class="icon-copy"></i>
</a>
</body>
</html>