<!-- input text -->
<input class="form-control form-control-lg" type="text" placeholder=".form-control-lg">
<input class="form-control" type="text" placeholder="Default input">
<input class="form-control form-control-sm" type="text" placeholder=".form-control-sm">

<!-- select -->
<select class="form-select form-select-lg">
  <option>Large select</option>
</select>
<select class="form-select">
  <option>Default select</option>
</select>
<select class="form-select form-select-sm">
  <option>Small select</option>
</select>