How many shutter panels do I need for each window? Usually, the bigger your window is, the more shutter panels you’ll want. Our recommendation 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 room-friendly as two separate panels. Oftentime, wide panel shutters can’t fit flush against the wall due to their width. Multiple smaller panels fix that.For windows that you might open or shut regularly, you’ll be better off with multi-panel shutters, since they’re easier to open and get better support from the frame when you do operate them.