I have some problems with a form in Bootstrap, since the input places them very small of their normal size, I am learning to use the Bootstrap grid but I have not understood it very well, so I ask for your help. my code is this
<form id="registrationForm" method="post" class="form-horizontal" action="#">
<div class="row">
<div class="col-lg-4 col-md-4 col-sm-6 col-xs-12">
<div class="form-group">
<label class="col-lg-3 control-label">Nombres</label>
<div class="col-lg-3">
<input type="text" class="form-control" name="nombre" />
</div>
</div>
</div>
<div class="col-lg-4 col-md-4 col-sm-6 col-xs-12">
<div class="form-group">
<label class="col-lg-3 control-label">Apellidos</label>
<div class="col-lg-3">
<input type="text" class="form-control" name="apellido" />
</div>
</div>
</div>
<div class="col-lg-4 col-md-4 col-sm-6 col-xs-12">
<div class="form-group">
<label class="col-lg-3 control-label">Correo Electrónico</label>
<div class="col-lg-3">
<input type="text" class="form-control" name="email" />
</div>
</div>
</div>
</div>
</form>