.thumbnail-item
{
  /* position relative so that we can use position absolute for the tooltip */
  position: relative;
  margin: 0px auto;
  width: 165px;
  margin-top: 10px;
}

  .thumbnail-item a
  {
    display: block;
  }

  .thumbnail-item img.thumbnail
  {
    border: 3px solid #A5A1A1;
  }

.image-tooltip-wrapper
{
  /* by default, hide it */
  display: none;
  /* allow us to move the tooltip */
  position: absolute;
  padding: 8px;
  background: #A5A1A1;
  border-radius: 10px;
}

  .image-tooltip-wrapper img
  {
    max-width: none;
    border: 2px solid #A5A1A1;
    border-radius: 10px;
  }