nrmorgs These look more like 3.5" but I'm not really sure which is why I was asking. :-) I have heard 3.5" - 4.5" are a newer "trend" since they allow more light in as well as more visibility to the outside. I am trying to decide what size I should go with but can't say that I've actually seen a 4.5" louver so thought maybe if yours were 3.5" it would help make up my mind because I like them! If you can find additional information and can share that's great!
Thanks for your time!
McCoppin Studios you might be right. I believe the window casing to left and right of window is 5" or 5.5", so plantations could be 3.5" or 4". Good luck! Ned
Thanks for your time!