Custom <select> menus need only a custom class, .form-select to trigger the custom styles. Custom styles are limited to the <select>’s initial appearance and cannot modify the <option>s due to browser limitations.

You may also choose from small and large custom selects to match our similarly sized text inputs.

The multiple attribute is also supported:

As is the size attribute:

Add the disabled boolean attribute on a select to give it a grayed out appearance and remove pointer events.