Louvered shutters for Levolor Shutters are available in 2 1/2 inches, 3 1/2 inches and 4 1/2 inches. The wider the louver, the wider the space between louvers will be when they're fully open. Louvers measuring 3 1/2 inches provide 56% greater visibility than their smaller counterparts. Similarly, the 4 1/2 inch louvers, known as shutters, provide a view that's 108% more clear than the 2 1/2 inch louvers.
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What is the difference between one louver size and another?