See Inside the Boeing CST-100 Starliner.
While on a media tour Feb 17 2017 at the Kennedy Space Center we were escorted to the Orbiter Processing Facility (OPF) where Boeing and Bigelow Aerospace are currently working on developing the CST-100 Starliner. Media was allowed a few moments to photograph the inside of the Starliner crew capsule so the image below is not the best. However the image still shows just how small the quarters are for the astronauts.
The Starliner has a diameter of 15 feet and length of 16.5 ft.
You can learn more about the Boeing CST-100 Starliner on the Beyond Earth website.