title: Qt QLabel border size
body: <p>I have a label which has border around, it was set by this function:</p>
  
  <pre><code>this-&gt;setStyleSheet("border: 1px solid black");
  </code></pre>
  
  <p>but when I wanned to change position of the label I had to also give width and height of the border but where do I get it from?</p>