Whats the best number of shutter panels for each window? For the most part, the larger the window, the more shutter panels you’ll want on it. The most ideal layout is to use one 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 user-friendly as two separate panels. Often, wide panel shutters won’t fit flush against the wall due to their size. Two smaller panels fix that.For those windows that you might open or shut regularly, you’ll be better off with multiple panels, since they’re easier to open and get additional support from the frame when you do open and shut them.