<div class="row">
<label for="colFormLabelExample" class="col-sm-2 col-form-label-sm">Email</label>
<div class="col-sm-10">
<input type="email" class="form-control form-control-sm" id="colFormLabelExample" placeholder="Enter your e-mail">
</div>
</div>
You don't need to remember all CSS classes. Just use the Bootstrap Editor instead.