<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <link href="//maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css" rel="stylesheet"> <div class="container"> <div class="row"> <div class="col-md-6"> <button class="btn btn-default btn-lg"><i class="fa fa-refresh fa-spin"></i> Loading</button> </div> <div class="col-md-6"> <button class="btn btn-primary btn-lg"><i class="fa fa-refresh fa-spin"></i> Loading</button> </div> </div> <div class="row"> <div class="col-md-6"> <button class="btn btn-danger btn-lg"><i class="fa fa-refresh fa-spin"></i> Loading</button> </div> <div class="col-md-6"> <button class="btn btn-info btn-md"><i class="fa fa-refresh fa-spin"></i> Loading</button> </div> </div> <div class="row"> <div class="col-md-6"> <button class="btn btn-warning btn-sm"><i class="fa fa-refresh fa-spin"></i> Loading</button> </div> <div class="col-md-6"> <button class="btn btn-success btn-xs"><i class="fa fa-refresh fa-spin"></i> Loading</button> </div> </div> </div> </div> </div>

.row { margin:10px; }