Create a small button group with Bootstrap

To create a large button group in Bootstrap, use the .btn-group-sm class.

Example

<!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>The following are the car brands:</p>
      <div class = "btn-group-justified">
         <button type = "button" class = "btn btn-default">BMW</button>
         <button type = "button" class = "btn btn-default">Audi</button>
         <button type = "button" class = "btn btn-default">Jeep</button>
         <button type = "button" class = "btn btn-default">Datsun</button>
         <button type = "button" class = "btn btn-default">Toyota</button>
      </div>
      <p>The following are FMCG:</p>
      <div class = "btn-group-justified btn-group-sm">
         <button type = "button" class = "btn btn-default">ITC Limited</button>
         <button type = "button" class = "btn btn-default">Colgate-Palmolive</button>
         <button type = "button" class = "btn btn-default">Nestle</button>
         <button type = "button" class = "btn btn-default">Britannia Industries Limited</button>
      </div>
   </body>
</html>