<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<div class="container">
<div class="row">
<div class="col-sm-3 col-md-2">
<div class="btn-group">
<button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown">
Mail <span class="caret"></span>
</button>
<ul class="dropdown-menu" role="menu">
<li><a href="#">Mail</a></li>
<li><a href="#">Contacts</a></li>
<li><a href="#">Tasks</a></li>
</ul>
</div>
</div>
<div class="col-sm-9 col-md-10">
<div class="btn-group">
<button type="button" class="btn btn-default">
<div class="checkbox" style="margin: 0;">
<label>
<input type="checkbox">
</label>
</div>
</button>
<button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">
<span class="caret"></span><span class="sr-only">Toggle Dropdown</span>
</button>
<ul class="dropdown-menu" role="menu">
<li><a href="#">All</a></li>
<li><a href="#">None</a></li>
<li><a href="#">Read</a></li>
<li><a href="#">Unread</a></li>
