tabler/preview/pages/_includes/parts/form/input-sizes.html

<div class="mb-3">
   <label class="form-label">Input sizing</label>
   <input class="form-control form-control-lg mb-2" type="text" placeholder=".form-control-lg">
   <input class="form-control mb-2" type="text" placeholder="Default input">
   <input class="form-control form-control-sm" type="text" placeholder=".form-control-sm">
</div>