How many shutter panels do I need for each window? Typically, the larger the window, the more shutter panels you’ll need. 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 are not as room-friendly as multiple separate panels. Oftentime, wide panel shutters can’t fit flush against the wall because of their width. Multiple smaller panels solve that problem.For those windows that you’ll want to open or shut often, you’re usually better suited with multi-panel shutters, since they’re easier to open and get additional support from the frame when you do open and close them.