<html>
<head>
<link rel = stylesheet href = https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.3.0/css/font-awesome.min.css>
<link rel = stylesheet href = http://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css>
<link rel = stylesheet href = /css_buttons/bootstrap-social.css>
</head>
<body>
<a class = btn btn-block btn-lg btn-social btn-twitter>
<span class = fa fa-twitter></span>
Login with Twitter
</a>
<a class = btn btn-block btn-md btn-social btn-twitter>
<span class = fa fa-twitter></span>
Login with Twitter
</a>
<a class = btn btn-block btn-sm btn-social btn-twitter>
<span class = fa fa-twitter></span>
Login with Twitter
</a>
<a class = btn btn-block btn-xs btn-social btn-twitter>
<span class = fa fa-twitter></span>
Login with Twitter
</a>
</body>
</html>
