Round and Centre

<style type="text/css">img {
  border-radius: 50%;
}
</style>
<p><img alt="Snow" height="300" src="https://photos.bravenet.com/292/091/931/5/5E120DAEED.jpg" width="300" /></p>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style type="text/css">img {
  display: block;
  margin-left: auto;
  margin-right: auto;
}
</style>