title: change size of marker in leaflet
body: <p>I have one marker on the map in leaflet:</p>
  
  <pre class="lang-js prettyprint-override"><code>var centerMarker = L.marker(centerPoint, { title: 'unselected' }).bindLabel(schools[i][0]);
  centerMarker.on('click', selectMarker);
  centerMarker.addTo(map);
  </code></pre>
  
  <p>I want to change the size of that marker on click.</p>
  
  <p>I know that we can change icons but I just want to change the size of the same icon of the marker.</p>