<input type="text" class="form-control input-lg" placeholder="Tamaño input-lg">
<input type="text" class="form-control" placeholder="Tamaño input normal">
<input type="text" class="form-control input-sm" placeholder="Tamaño input-sm">

External CSS

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

External JavaScript

This Pen doesn't use any external JavaScript resources.