I am considering window shutters for a large bay window in my 1930s house. Any suggestions on Louvre slat size? The choices are 76mm or 89mm. The window overlooks a busy road with lots of public transport, but also overlooks fields, so I want some privacy but also be able to look out. I want to keep lots of light in the room and for the shutters to look like they were meant to be there. Any advice?