Creating a Zoom Effect on an image on hover using CSS

Question

I'm currently trying to create a zoom effect on hover over one of my four images. The problem is most examples usually use tables or mask divs to apply some sort of effect.

Here's one example that implements what I would like this.

This is my code so far.

HTML

<div id="menu">
<img class ="blog" src="http://s18.postimg.org/il7hbk7i1/image.png" alt="">
<img class ="music" src="http://s18.postimg.org/4st2fxgqh/image.png" alt="">
<img class ="projects" src="http://s18.postimg.org/sxtrxn115/image.png" alt="">
<img class ="bio" src="http://s18.postimg.org/5xn4lb37d/image.png" alt="">
</div>

CSS

#menu {
    max-width: 1200px;
    text-align: center;
    margin: auto;
}

#menu img {
    width: 250px;
    height: 375px;
    padding: 0px 5px 0px 5px;
    overflow: hidden;
}

.blog {
    height: 375px;
    -webkit-transition: all 1s ease;
    -moz-transition: all 1s ease;
    -o-transition: all 1s ease;
    -ms-transition: all 1s ease;
    transition: all 1s ease;
}

.blog:hover {
    cursor: pointer;
    height:475px;
    width: 350px;
}

.music {
    height: 375px;
}

.projects {
    height: 375px;
}

.bio {
    height: 375px;
}

Answer 1

Try using the following code:

<style>
.zoom {
  padding: 50px;
  background-color: green;
  transition: transform .2s; /* Animation */
  width: 200px;
  height: 200px;
  margin: 0 auto;
}

.zoom:hover {
  transform: scale(1.5); /* (150% zoom - Note: if the zoom is too large, it will go outside of the viewport) */
}
</style>

<div class="zoom"></div>