Opening Size: 1-5/8 x 3/16 x 3-3/8
Outside Size: 2-5/16 x 5/16 x 3-3/4
And from Jackson Miniatures website:
these smaller doors and windows are made from high quality injection moulded white styrene and can be painted easily using ordinary hobby paints if you would like them to have a different appearance. (We recommend you start with a matte undercoat to stop the top coat "beading".)
No interior trim is included.