Size

<nav class="navbar navbar-expand bg-dark navbar-1" data-bs-theme="dark">
  <div class="container-fluid"><a class="navbar-brand" href="#">Size 1</a>
    <div class="collapse navbar-collapse">
      <ul class="navbar-nav">
        <li class="nav-item"><a class="nav-link" href="#">Item 1</a></li>
        <li class="nav-item"><a class="nav-link" href="#">Item 2</a></li>
        <li class="nav-item"><a class="nav-link" href="#">Item 3</a></li>
      </ul>
    </div>
  </div>
</nav>

<nav class="navbar navbar-expand bg-dark navbar-2" data-bs-theme="dark">
  <div class="container-fluid"><a class="navbar-brand" href="#">Size 2</a>
    <div class="collapse navbar-collapse">
      <ul class="navbar-nav">
        <li class="nav-item"><a class="nav-link" href="#">Item 1</a></li>
        <li class="nav-item"><a class="nav-link" href="#">Item 2</a></li>
        <li class="nav-item"><a class="nav-link" href="#">Item 3</a></li>
      </ul>
    </div>
  </div>
</nav>

<nav class="navbar navbar-expand bg-dark navbar-3" data-bs-theme="dark">
  <div class="container-fluid"><a class="navbar-brand" href="#">Size 3</a>
    <div class="collapse navbar-collapse">
      <ul class="navbar-nav">
        <li class="nav-item"><a class="nav-link" href="#">Item 1</a></li>
        <li class="nav-item"><a class="nav-link" href="#">Item 2</a></li>
        <li class="nav-item"><a class="nav-link" href="#">Item 3</a></li>
      </ul>
    </div>
  </div>
</nav>

<nav class="navbar navbar-expand bg-dark navbar-4" data-bs-theme="dark">
  <div class="container-fluid"><a class="navbar-brand" href="#">Size 4</a>
    <div class="collapse navbar-collapse">
      <ul class="navbar-nav">
        <li class="nav-item"><a class="nav-link" href="#">Item 1</a></li>
        <li class="nav-item"><a class="nav-link" href="#">Item 2</a></li>
        <li class="nav-item"><a class="nav-link" href="#">Item 3</a></li>
      </ul>
    </div>
  </div>
</nav>