The beauty of shutters, is that they can be made to perfectly fit any size or shape of window recess. A classic example of this is shown in these photos of a lovely Cheltenham bathroom, installed recently. The client was keen to preserve the elegant shape of the window as well as achieving some privacy from the next door neighbours!
The specification was for shutters using 89 mm slats and concealed push rods. The great thing is that they look as good when fully opened back to the walls as they do when closed.