<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>
<div class="container">
<div class="row">
<div class="col-md-5">
<a href="" class="btn btn-xs btn-red">Button</a>
<a href="" class="btn btn-sm btn-red">Button</a>
<a href="" class="btn btn-default btn-red">Button</a>
<a href="" class="btn btn-lg btn-red">Button</a>
<code>.btn-red</code>
</div>
<div class="col-md-5">
<a href="" class="btn btn-lg btn-lred">Button</a>
<a href="" class="btn btn-default btn-lred">Button</a>
<a href="" class="btn btn-sm btn-lred">Button</a>
<a href="" class="btn btn-xs btn-lred">Button</a>
<code>.btn-lred</code>
</div>
</div>
<div class="row">
<div class="col-md-5">
<a href="" class="btn btn-xs btn-pink">Button</a>
<a href="" class="btn btn-sm btn-pink">Button</a>
<a href="" class="btn btn-default btn-pink">Button</a>
<a href="" class="btn btn-lg btn-pink">Button</a>
<code>.btn-pink</code>
</div>
<div class="col-md-5">
<a href="" class="btn btn-lg btn-lpink">Button</a>
<a href="" class="btn btn-default btn-lpink">Button</a>
<a href="" class="btn btn-sm btn-lpink">Button</a>
<a href="" class="btn btn-xs btn-lpink">Button</a>