A nice little window set. It includes a painted wooden frame with 12 window panes ("6 over 6"), a plexiglass insert (that comes with a vinyl coating so it doesn't get scratched), and 4 little slats of wood that fit into the back to hold the "glass" in place).
Fits into a 2-1/2" x 4-3/4" hole (with a lip that extends out). See my many photos for more details.
Sold as a set (one window frame, 4 slats to hold the plexiglass in place, 1 plexi window).
This item is in Dollhouse 1:12 Scale.