Bootstrap Create a Small Button

First Page
<!DOCTYPE html>
<html>
   <head>
      <title>Bootstrap Example</title>
      <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css">
      <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
      <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
   </head>
   <body>
      <p>Click below if you want to know the warning message:</p>
      <button type="button" class="btn btn-warning">Warning</button>
      <p>Click below if you want to know the result:</p>
      <button type="button" class="btn btn-primary btn-sm">Result</button>
   </body>
</html>
Output

First Page