ul class="thumbnails">
  <li class="span3 offset3">
    <a href="#" class="thumbnail">
      <img data-src="holder.js/260x180" alt="">
    </a>
  </li>
  <li class="span3">
    <a href="#" class="thumbnail">
      <img data-src="holder.js/260x180" alt="">
    </a>
  </li>
  <li class="span3">
    <a href="#" class="thumbnail">
      <img data-src="holder.js/260x180" alt="">
    </a>
  </li>
</ul>
-->

<h4>Standard grid sizing</h4>
<ul class="thumbnails">
  <li class="span3">
    <a href="#" class="thumbnail