<!DOCTYPE html>
<html>
<head>
<style type='text/css'>
body {
padding: 5px;
}
/* (item margins = 5) */
.masonry {
-webkit-column-width: 150px;
-moz-column-width: 150px;
column-width: 150px;
/* same with bottom margin for the items */
-webkit-column-gap: 5px;
-moz-column-gap: 5px;
column-gap: 5px;
}
.masonry img {
display: block;
/* expand! */
width: 100%;
height: auto;
background-color: silver;
/* bottom margin */
margin: 0 0 5px 0;
}
</style>
</head>
<body>
<div class='masonry'>
<img alt="" width="150" height="200" src="http://lorempixel.com/150/200/animals/1" />
<img alt="" width="150" height="250" src="http://lorempixel.com/150/250/animals/2" />
<img alt="" width="150" height="200" src="http://lorempixel.com/150/200/animals/3" />
<img alt="" width="150" height="150" src="http://lorempixel.com/150/150/animals/4" />
<img alt="" width="150" height="100" src="http://lorempixel.com/150/100/animals/5" />
<img alt="" width="150" height="100" src="http://lorempixel.com/150/100/animals/6" />
<img alt="" width="150" height="100" src="http://lorempixel.com/150/100/animals/7" />
<img alt="" width="150" height="100" src="http://lorempixel.com/150/100/animals/8" />
<img alt="" width="150" height="200" src="http://lorempixel.com/150/200/animals/9" />
<img alt="" width="150" height="250" src="http://lorempixel.com/150/250/food/1" />
<img alt="" width="150" height="150" src="http://lorempixel.com/150/150/food/2" />
<img alt="" width="150" height="100" src="http://lorempixel.com/150/100/food/3" />
<img alt="" width="150" height="100" src="http://lorempixel.com/150/100/food/4" />
<img alt="" width="150" height="150" src="http://lorempixel.com/150/150/food/5" />
<img alt="" width="150" height="200" src="http://lorempixel.com/150/200/food/6" />
<img alt="" width="150" height="150" src="http://lorempixel.com/150/150/food/7" />
<img alt="" width="150" height="150" src="http://lorempixel.com/150/250/food/8" />
</div>
</body>
</html>