This will help to resolve the issue of sizing in your css rather than within js code.
PhysicsEngine and the size bounding of a Famo.us App
A transition button by John Traver https://github.com/john45traver
A simple Famo.us App template, with header footer layout, tabs at the bottom and a lightbox to change content by zawaung
A simple famous Widget using a Render Node and keeping track of a changing size.