<html lang="en"><head> <title>Bootstrap Example</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script></head><body><div class="container"> <h1>Width Utilities</h1> <p>Set the width of an element with the w-* classes:</p> <div class="w-25 bg-warning">Width 25%</div> <div class="w-50 bg-warning">Width 50%</div> <div class="w-75 bg-warning">Width 75%</div> <div class="w-100 bg-warning">Width 100%</div> <div class="mw-100 bg-warning">Max Width 100%</div></div></body></html>