Inténtalo tú mismo - W3.CSS pagination

<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="/lib/w3.css">
<body>

<div class="w3-container">
  <h2>Bordered Pagination</h2>
  <p>Add the w3-border class to add borders to the pagination:</p>

  <ul class="w3-pagination w3-border">
   <li><a href="#">«</a></li>
   <li><a class="w3-green" href="#">1</a></li>
   <li><a href="#">2</a></li>
   <li><a href="#">3</a></li>
   <li><a href="#">4</a></li>
   <li><a href="#">5</a></li>
   <li><a href="#">»</a></li>
  </ul>
</div>

</body>
</html>