Ex.

<div class="shadow-none p-3 mb-5 bg-light rounded">No shadow</div>
<div class="shadow-sm p-3 mb-5 bg-body rounded">shadow-sm</div>
<div class="shadow p-3 mb-5 bg-body rounded">shadow</div>
<div class="shadow-md p-3 mb-5 bg-body rounded">shadow-md</div>
<div class="shadow-lg p-3 mb-5 bg-body rounded">shadow-lg</div>