<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-12">
<div class="alert alert-danger visible-lg" role="alert">File size: 750 KB
<span class="badge pull-right">100%</span>
</div>
<div class="alert alert-warning visible-md" role="alert">File size: 355 KB
<span class="badge pull-right">47% of original</span>
</div>
<div class="alert alert-info visible-sm" role="alert">File size: 239 KB
<span class="badge pull-right">32% of original</span>
</div>
<div class="alert alert-success visible-xs" role="alert">File size: 55 KB
<span class="badge pull-right">7.3% of original</span>
</div>
<img class="visible-lg" src="http://i.imgur.com/tGHlxc0.jpg" width="100%" alt="" title="File size= 750KB">
<img class="visible-md" src="http://i.imgur.com/huPSRaO.jpg" width="100%" alt="" title="File size= 355KB">
<img class="visible-sm" src="http://i.imgur.com/CiU2QTE.jpg" width="100%" alt="" title="File size= 239KB">
<img class="visible-xs" src="http://i.imgur.com/2A1sDg4.jpg" width="100%" alt="" title="File size= 55KB">
</div>
</div>
</div>
