How many shutter panels do I need for each window? For the most part, the bigger your window is, the more shutter panels you’ll want on it. The most ideal layout is to use a single panel for windows up to 26 in. wide, two panels for windows up to 50 in. wide, and four for windows up to 98 in. wide.Single wide panels aren’t as user-friendly as multiple panels. Sometimes, wide panel shutters can’t fit flush against the wall due to their size. Multiple smaller panels don’t have that same issue.For windows that you may want to open or shut regularly, you’ll be better suited with multi-panel shutters, since it’s easier to open them and they get additional support from the shutter frame when you do open and close them.