Whats the best number of shutter panels for each window? Typically, the the large the surface area of your window, the more shutter panels you’ll want. Our recommendation is to use a single panel for windows up to 26 inches wide, two panels for windows up to 50 inches wide, and four for windows up to 98 inches wide.Single wide panels aren’t as room-friendly as multiple separate panels. Often, wider panels won’t fit flush against the wall because of their width. Multiple smaller panels don’t have that same issue.For any windows that you might want to open or shut often, you’re usually better off with multiple panels, since it’s easier to open them and they have additional support from the frame when you do open and shut them.