<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<head><link href='http://fonts.googleapis.com/css?family=Ubuntu:400,700&subset=latin,cyrillic,cyrillic-ext,latin-ext' rel='stylesheet' type='text/css'></head>
<body>
<div class="container">
<div class="row">
<button class="btn btn-sm btn-default">Default</button>
<button class="btn btn-sm btn-primary">Primary</button>
<button class="btn btn-sm btn-info">Info</button>
<button class="btn btn-sm btn-success">Success</button>
<button class="btn btn-sm btn-danger">Danger</button>
<button class="btn btn-sm btn-warning">Warning</button>
<br>
<br>
<button class="btn btn-default">Default</button>
<button class="btn btn-primary">Primary</button>
<button class="btn btn-info">Info</button>
<button class="btn btn-success">Success</button>
<button class="btn btn-danger">Danger</button>
<button class="btn btn-warning">Warning</button>
<br>
<br>
<button class="btn btn-lg btn-default">Default</button>
<button class="btn btn-lg btn-primary">Primary</button>
<button class="btn btn-lg btn-info">Info</button>
<button class="btn btn-lg btn-success">Success</button>
<button class="btn btn-lg btn-danger">Danger</button>
<button class="btn btn-lg btn-warning">Warning</button>
</div>
</div>
</body>
