Live on the lake or a golf course? Need protection from the sun's harmful UV rays and still want a great view? The 4 1/2" shutters are the only way to go. The 4 1/2" shutter is the largest louver that we offer. These look great on big windows or on windows where the view is key. The 4 1/2" shutters are more contemporary and provide a nice uncluttered look on big windows. We recently did the NC State Alumni Center in Raleigh and they had 12 foot tall windows. The 4 1/2" shutters were the only way to go and the job turned out great. If we had used the 2 1/2" shutters the windows would have been too busy. Also, a lot of companies cannot make a 12 foot tall shutter. NC State called us and it was not a problem.