ize
  is smaller than containing-block's height (short sentence)

  -->

  <style type="text/css"><![CDATA[
  body
    {
      font-size: 16px;
      line-height: 1.25; /* therefore, each line box is 20px tall */
      margin-bottom: 0px;
      margin-top: 0px;
    }

  div#sized-400px-htb-containing-block
    {
      height: 400px;
    }

  div#ortho-block-vlr
    {
      border: blue solid 3px;
      height: auto;
      writing-mode: vertical-lr;
    }
  ]]></style>

 </head>

 <body>

  <div id="sized-40