<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> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <div class="col-md-12"> <p> <button type="button" class="btn btn-primary btn-lg">Large button</button> btn btn-primary btn-lg </p> <p> <button type="button" class="btn btn-primary">Default button</button> btn btn-primary </p> <p> <button type="button" class="btn btn-primary btn-sm">Small button</button> btn btn-primary btn-sm </p> <p> <button type="button" class="btn btn-primary btn-xs">Extra small button</button> btn btn-primary btn-xs </p> </div> </div> </div>

body{ padding-top: 50px; } .bigger p { padding-top: 13px; }