* {
  box-sizing: border-box;
}

.zoom {
  padding: 0px;
  background-color: none;
  transition: transform .2s;
  width: 250px;
  height: 150px;
  margin: 0;
}

.zoom:hover {
  -ms-transform: scale(1.5); /* IE 9 */
  -webkit-transform: scale(1.5); /* Safari 3-8 */
  transform: scale(1.5); 
}