.trans img {
    -webkit-transition: all 1s ease; /* Safari and Chrome */
    -moz-transition: all 1s ease; /* Firefox */
    -o-transition: all 1s ease; /* IE 9 */
    -ms-transition: all 1s ease; /* Opera */
    transition: all 1s ease;
       
}
.trans:hover img {
    -webkit-transform:scale(1.20); /* Safari and Chrome */
    -moz-transform:scale(1.20); /* Firefox */
    -ms-transform:scale(1.20); /* IE 9 */
    -o-transform:scale(1.20); /* Opera */
     transform:scale(1.20);
}
/* just apply some height and width to the wrapper. */
.trans {
  width:330px;
  height:330px;
  overflow: auto;
}