<!DOCTYPE html>
<title>Circle shape-outside on floats</title>
<style>
.container {
    font: 20px/1 Ahem, sans-serif;
    width: 500px;
    height: 200px;
    border: 1px solid black;
}

.circle {
    width: 160px;
    height: 160px;
    background-color: blue;
    overflow: hidden;
    border-radius: 80px;
    -webkit-shape-outside: circle(80px at 80px 80px);
}
</style>

<body>
<p>The black squares should trace the right side of the circle's blue outline.</p>
<div class="container">
X<br/>
    <div style="float: left" class="circle"></div>
X<br/>
X<br/>
X<br/>
X<br/>
X<br/>
X<br/>
X<br/>
X<br/>
X
</div>

<p>The black squares should trace the left side of the circle's blue outline.</p>
<div class="container" style="text-align: right">
X<br/>
    <div style="float: right" class="circle"></div>
X<br/>
X<br/>
X<br/>
X<br/>
X<br/>
X<br/>
X<br/>
X<br/>
X
</div>
</body>