<!DOCTYPE html>
<html>
<!--
 | Overflow hidden should only affect the content within the padding box,
 | and not the borders around it.  Note that while it is somewhat unintuitive
 | that we clip to the padding box and not the content box, this behavior is
 | consistent with Chrome and IE.
 |   https://www.w3.org/TR/CSS21/visufx.html
 -->
<head>
  <style>
    body {
      font-family: Roboto;
      font-size: 16px;
    }

    .overflow {
      width: 50px;
      height: 50px;
      padding: 50px;
      border: 50px solid green;
      overflow: hidden;
      background: blue;
    }

    .content {
      background: red;
      width: 200px;
      height: 200px;
    }

  </style>
</head>
<body>
  <div class="overflow">
    <div class="content"></div>
  </div>
</body>
</html>