<link href="//netdna.bootstrapcdn.com/bootstrap/3.1.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//netdna.bootstrapcdn.com/bootstrap/3.1.0/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-lg-12"> <h2 class="bold">Scrollable Menu</h2> <div class="btn-group"> <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">Scrollable Menu <span class="caret"></span></button> <ul class="dropdown-menu scrollable-menu" role="menu"> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> </ul> </div> <div class="btn-group"> <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">Non Scrollable Menu <span class="caret"></span></button> <ul class="dropdown-menu" role="menu"> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> </ul> </div> </div> </div> </div>

.scrollable-menu { height: auto; max-height: 200px; overflow-x: hidden; }