Edit in JSFiddle

<div class="pic">
   <img src="http://www.muratoner.net/images/test.jpg" width="250px" height="250px">
</div>

.pic{
  float:left;
  height: 200px;
  width: 200px;
  margin: 20px;
  overflow: hidden;
  border-radius: 10px;
  -webkit-box-shadow: 0 0 10px rgba(0,0,0,.3);
  box-shadow: 0 0 10px rgba(0,0,0,.3);
}

.pic>img{
  height:250px;
  width:250px;

  -webkit-transition:all 1s ease;
  -moz-transition:all 1s ease;
  -o-transition:all 1s ease;
  -ms-transition:all 1s ease;
  transition:all 1s ease;
}

.pic>img:hover{
  width: 200px;
  height: 200px;
}