5. Too small for the window- if you think that shutters should go way beyond the usual size of the window, then it is your choice whether you want a kind of shutter that is bigger or the exact size of the window. According to experts, it would be best to have a shutter for windows that is a little bit extended so as to cover any stains that are evident. Great read here
Now that you know about the rules not to follow about shutters, it is basically, your decision whether you want to have shutters on the sides of the house, or if you do not want shutters in front of your home.