.img_wrap{
  border: 1px solid #ddd;
  margin: 0 auto;
  overflow: hidden;
  cursor: pointer;
}
.img_wrap img{
  width: 100%;
  transition-duration: 0.5s;
}
.img_wrap:hover img{
  transform: scale(1.2);
  transition-duration: 0.5s;
}