Exercise:

Change the size of the buttons in the following order: large, medium, small and xsmall.

Hint: For large buttons, use the .btn-lg class.

<!DOCTYPE html>
<html lang="en">
<head>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="../../maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
  <script src="../../ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
  <script src="../../maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>

<div class="container">          
  <button type="button" class="btn btn-primary btn-lg">Button</button>
  <button type="button" class="btn btn-primary btn-md">Button</button>
  <button type="button" class="btn btn-primary btn-sm">Button</button>
  <button type="button" class="btn btn-primary btn-xs">Button</button>
</div>

</body>
</html>