<!DOCTYPE html>
<html>
<meta charset="utf-8">
<link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
<link rel="author" title="Mozilla" href="https://www.mozilla.org/">
<style>
@page { size: 5in 3in; margin: 0.5in; }
body { margin: 0; }
.flexbox {
border: 0.25in solid black;
font-size: 0.25in;
height: 3in;
}
.flexbox > div {
position: relative;
}
.item {
position: absolute;
contain: size;
box-sizing: border-box;
border: 4px solid purple;
width: 25%;
height: 0.5in;
}
</style>
<!-- This div makes the flexbox not at the top of first page. -->
<div style="height: 0.25in; background: gray;"></div>
<div class="flexbox">
<div style="height: 1.5in;">
<div class="item" style="top: 1in">1</div>
<div class="item" style="left: 25%;">2</div>
</div>
<div style="height: 1in;">
<div class="item" style="left: 50%; height: 1in;">3</div>
<div class="item" style="left: 75%;">4</div>
</div>
<div>
<div class="item">5</div>
<div class="item" style="left: 25%">6</div>
<div class="item" style="left: 50%">7</div>
<div class="item" style="left: 75%">8</div>
</div>
</div>
<div style="height: 0.25in; background: gray;"></div>
</html>