4 pane window with window frame.  1.5" x 2.5" is the inset dimensions.  OD is 2.0" in width and 3.65" in height.  The design is for the Garden Railways "Branchline station drawings in 1:29 scale" by Steven Terry.

1.75" x 2.5" outside measurement, 4 pane window with clear polycarbonate window glass.  Thickness of window frame is 0.25".  Made from white ABS material.

New product from Rallec Railroad. 3D printed, ABS, factory window with brick facade. 12 panes arranged 3 across by 4 down. White ABS takes color the best. Different sizes available on request.

The drum is printed using the FDM process from high quality ABS material.  It is 1.65" in height by 1.15" in diameter.  This corresponds to 3 feet in height by 2 feet in diameter.