<link href="//netdna.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<div class="container">
<div class="row">
<h2>Any image, size doesn´t matter, centered and respecting ratio</h2>
</div>
<div class="row">
<div class="col-sm-2">
<p> Image in to circle</</p>
<div class="ratio img-responsive img-circle" style="background-image: url(https://camo.githubusercontent.com/47dcfb965976b72705949abac49512c08f98b60e/687474703a2f2f696d672e736b697463682e636f6d2f32303132303730322d6b36636370376b6b6a6a686163663371693279357972683768712e676966);"></div>
</div>
<div class="col-sm-10">
<p> Real image</p>
<img src="https://camo.githubusercontent.com/47dcfb965976b72705949abac49512c08f98b60e/687474703a2f2f696d672e736b697463682e636f6d2f32303132303730322d6b36636370376b6b6a6a686163663371693279357972683768712e676966">
</div>
</div>
</div>