要创建一个大按钮，请使用Bootstrap中的.btn-lg类。
您可以尝试运行以下代码来实现.btn-lg类-
<!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://cdn.staticfile.org/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 FMCG companies:</p> <div class = "btn-default"> <button type = "button" class="btn btn-primary">ITC Limited</button> <button type = "button" class="btn btn-sm">Nestle</button> <button type = "button" class="btn btn-lg">Britannia Industries Limited</button> </div> </body> </html>