p>
      </div>
    </div>
    <div class="flexbox">
      <div style="flex: 0 0 30px"
           data-expected-width="30" data-expected-height="45">
        <p>xx xxx</p>
        <p>xx</p>
      </div>
    </div>
    <br>

    <!-- Row 3: min main-size OR min cross-size, or both -->
    <div class="flexbox">
      <div style="min-width: 75px"
           data-expected-width="75" data-expected-height="35">
        <p>xx xxx</p>
        <p>xx</p>
      </div>
    </div>
    <div class="flexbox">
      <div st