title: Why do font awesome icons overlap with border?
body: <p>Why do the icons  overlap the border?<br>
  I know that <code>padding</code> will solve the problem, but I want to know the reason for the overlapping.</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>i {
    background-color: #ccc;
    border-radius: 50%;
    border: 3px red solid;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;link href="https://use.fontawesome.com/releases/v5.1.0/css/all.css" rel="stylesheet" /&gt;
  &lt;i class="fab fa-500px fa-5x"&gt;&lt;/i&gt;
  &lt;!--icon1--&gt;
  &lt;i class="fab fa-accusoft fa-5x"&gt;&lt;/i&gt;
  &lt;!--icon2--&gt;</code></pre>
  </div>
  </div>
  </p>