title: How to get margin between columns in bootstrap?
body: <p>How did he manage to get that margin between the cols?</p>
  
  <p><a href="http://www.prepbootstrap.com/bootstrap-template/articles-layout" rel="nofollow">http://www.prepbootstrap.com/bootstrap-template/articles-layout</a></p>
  
  <p>It's probably me being stupid not seeing it, but I can't figure out how he did it reading the code. </p>
  
  <p>Edit: </p>
  
  <p>Just figured out how he did it.</p>
  
  <p>I first had this code:</p>
  
  <pre><code>&lt;div class="col-md-3 thumb"&gt;
     ...
  &lt;/div&gt;
  </code></pre>
  
  <p>I changed it to this:</p>
  
  <pre><code>&lt;div class="col-md-3"&gt;
     &lt;div class="thumb"&gt;
        ...
     &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>And this seems to put a margin in between the cols. However, i'm still curious, how did this happen? And is there a way to make the margins smaller (or bigger)?</p>