<style>
* {
  box-sizing: border-box;
}
.zoomx {
  padding: 0px;
  transition: transform 2s;
  width: 250px;
  height: 250px;
  margin: 0 auto;
}

.zoomx:hover {
  -ms-transform: scale(1.5); /* IE 9 */
  -webkit-transform: scale(1.5); /* Safari 3-8 */
  transform: scale(1.5); 
}
</style>