title: same img size in a row /// col-8 <-> col-4
body: <p>I am absolute newbee and wanna create 2 rows. One with 2 img col-4 size and col-8 size and the other row à 3 x col-4 size.
  My problem is that the col-8 img is a little bit bigger (height) then the col-4 img.
  How can I fix it? I tried a lot but nothing worked.
  Thanks for your help.
  [problem</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.col-4 {
    padding-left: 5px;
    padding-right: 5px;
  }
  
  .col-8 {
    padding-left: 5px;
    padding-right: 5px;
  }
  
  .x1 {
    border: 1px solid black;
  }
  
  .x2 {
    border: 1px solid black;
  }
  
  .x1_pic {
    width: 100%;
    height: auto;
    position: relative;
  }
  
  .x2_pic {
    width: 100%;
    height: auto;
    position: relative;
  }
  
  .x1_header {
    position: absolute;
    margin-top: -95%;
    text-align: center;
  }
  
  .x2_header {
    position: absolute;
    margin-top: -95%;
    text-align: center;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="container"&gt;
      &lt;div class="row"&gt;
          &lt;div class="col-4"&gt;
              &lt;div class="x1"&gt;
                  &lt;img class="x1_pic" src="./img/header-background.jpg"&gt;
              &lt;/div&gt;
          &lt;/div&gt;
          &lt;div class="col-8"&gt;
              &lt;div class="x2"&gt;
                  &lt;img class="x2_pic" src="./img/maschine_2.jpg"&gt;
              &lt;/div&gt;
          &lt;/div&gt;
      &lt;/div&gt;   
      &lt;div class="row"&gt;
          &lt;div class="col-4"&gt;
              &lt;div class="x1"&gt;
                  &lt;img class="x1_pic" src="./img/header-background.jpg"&gt;
              &lt;/div&gt;
          &lt;/div&gt;
          &lt;div class="col-4"&gt;
              &lt;div class="x1"&gt;
                  &lt;img class="x1_pic" src="./img/header-background.jpg"&gt;
              &lt;/div&gt;
          &lt;/div&gt;
          &lt;div class="col-4"&gt;
              &lt;div class="x1"&gt;
                  &lt;img class="x1_pic" src="./img/header-background.jpg"&gt;
              &lt;/div&gt;
          &lt;/div&gt;
      &lt;/div&gt;     
  &lt;/div&gt;  </code></pre>
  </div>
  </div>
  </p>
  
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