<html>
<head>
<title>default box sizing (border-collapse: separate, standards mode)</title>
<style type="text/css">

body > div { float: left; clear: left; background: fuchsia; margin: 2px 0; padding: 10px; }

table {
  border-collapse: collapse;
  border-spacing: 5px 3px;
  padding: 2px 3px 4px 5px;
  border: medium solid blue;
  border-width: 2px 4px 6px 8px;
}

td {
  border: medium solid aqua;
  border-width: 2px 4px 6px 8px;
  padding: 5px 7px 9px 11px;
}

td > div {
  background: yellow;
}

</style>
</head>
<body>

<div>
  <table width="200">
    <tr>
      <td><div>x</div></td>
    </tr>
  </table>
</div>

<div>
  <table>
    <tr>
      <td width="200"><div>x</div></td>
    </tr>
  </table>
</div>

</body>
</html>