script>
  </head>
  <body onload="checkLayout('.flexbox > div')">
    <!-- Row 1: no special sizing: -->
    <div class="flexbox">
      <div data-expected-width="70" data-expected-height="35">
        <p>xx xxx</p>
        <p>xx</p>
      </div>
    </div>
    <div class="flexbox" style="width: 50px">
      <div data-expected-width="50" data-expected-height="45">
        <p>xx xxx</p>
        <p>xx</p>
      </div>
    </div>
    <div class="flexbox" style="width: 20px">
      <div data-expected-width="20"