I like using a background image. I find it easier and more flexible:
CSS:
#menu {
max-width: 1200px;
text-align: center;
margin: auto;
}
.zoomimg {
display: inline-block;
width: 250px;
height: 375px;
padding: 0px 5px 0px 5px;
background-size: 100% 100%;
background-repeat: no-repeat;
background-position: center center;
transition: all .5s ease;
}
.zoomimg:hover {
cursor: pointer;
background-size: 150% 150%;
}
.blog {
background-image: url(http://s18.postimg.org/il7hbk7i1/image.png);
}
.music {
background-image: url(http://s18.postimg.org/4st2fxgqh/image.png);
}
.projects {
background-image: url(http://s18.postimg.org/sxtrxn115/image.png);
}
.bio {
background-image: url(http://s18.postimg.org/5xn4lb37d/image.png);
}
HTML:
<div id="menu">
<div class="blog zoomimg"></div>
<div class="music zoomimg"></div>
<div class="projects zoomimg"></div>
<div class="bio zoomimg"></div>
</div>