<div class="row">
  <div class="col-sm-4">
    <input type="text" class="form-control" placeholder="Tamaño 4">
  </div>
  <div class="col-sm-5">
    <input type="text" class="form-control" placeholder="Tamaño 5">
  </div>
  <div class="col-sm-3">
    <input type="text" class="form-control" placeholder="Tamaño 3">
  </div>
</div>

External CSS

  1. //maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css

External JavaScript

This Pen doesn't use any external JavaScript resources.