This TMP screencap
should help to determine the size, although I would only go by the diameter of the circular docking port doors.
I don't trust transparent aluminium, that stuff has unpredictable properties.
In the above docking port scene it appears to have a magnifying effect, but just a few scenes earlier
it seemed to have a minimizing effect (gee, that's a giant of a travel pod
Close to the windows the interiors appear darker but from the distance they shine like a floodlight