How many shutter panels do I need for each window? Usually, the the large the surface area of your window, the more shutter panels you’ll want on it. Our recommendation is to use a single panel for windows up to 26” wide, two panels for windows up to 50” wide, and four for windows up to 98” wide.Single wide panels aren’t as room-friendly as multiple separate panels. Often, wide panel shutters won’t fit flush against the wall due to their size. Multiple small panels don’t have that problem.For those windows that you might open or shut regularly, you’re usually better suited with multiple panels, since it’s easier to open them and they have more support from the shutter frame when you do open and shut them.