<p dir="auto">on both the css and components pages in the documentation it refers to btn-lg btn-sm and btn-xs but in reality in the css files it is referred to as btn-large btn-small and btn-mini</p>
<p dir="auto">To increase/decrease the size of form controls, you can add the classes input-lg or input-sm (at least according to the website [http://getbootstrap.com/css/#forms] - which is the most consistent solution). In the css code, however, the classes are called input-large and input-small.</p>