<style type="text/css">
.container {
width: 300px;
height: 400px;
margin: 50px auto;
border: 1px solid #ccc;
display: table;
}
.img {
text-align: center;
vertical-align: middle;
display: table-cell;
}
img {
width: 260px;
height: 350px;
}
</style>
<body>
<div class="container">
<div class="img">
<img src="your_image.jpg">
</div>
</div>
</body>