How many shutter panels do I need for each window? Usually, the bigger your window is, the more shutter panels you’ll want on it. The most ideal layout is to use one 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 panels. Oftentime, wide panel shutters can’t fit flush against the wall due to their width. Two smaller panels resolve that.For any windows that you may want to open or shut regularly, you’ll be better off with multiple panels, since they’re easier to open and get better support from the shutter frame when you do operate them.