<style type="text/css">
.sample_code{
  margin-bottom:4px;
  text-align:center;
}
.sample_code span{
  display:inline-block;
  border:1px solid #aaa;
  width:auto;
  background-color:#eee;
  padding:4px;
}
.sample_code span:hover{
  background-color:#ccc;  
  border:1px solid #444;
}
.sample_code img{
  border:1px solid #000;
}

</style>

<div class="sample_code"><span>[thumb=95]</span></div>