<!-- Small modal -->
  <button class="btn btn-primary" data-toggle="modal" data-target=".example-modal-lg">Large modal</button>

  <div class="modal fade example-modal-lg" tabindex="-1" role="dialog" aria-labelledby="myLargeModalLabel" aria-hidden="true">
    <div class="modal-dialog modal-lg">
      <div class="modal-content">
        ...
      </div>
    </div>
  </div>

  <!-- Small modal -->
  <button class="btn btn-primary" data-toggle="modal" data-target=".example-modal-sm">Small modal</button>

  <div class="modal fade example-modal-sm" tabindex="-1" role="dialog" aria-labelledby="mySmallModalLabel" aria-hidden="true">
    <div class="modal-dialog modal-sm">
      <div class="modal-content">
        ...
      </div>
    </div>
  </div>