Sorry wrong forum; don't know how to delete this!

Thanks. By matching side panels do you mean matching curtains on the side of the windows? Like this?

Why do you have windows between rooms? That seems odd to me, although I had that in the house where I grew up that was built by my great grandfather (and grandfather), and they had lot of weird ideas. My mother put curtains on both sides of the windows before she converted them to built-in shelves. I would change the sliding doors to French doors and perhaps just have blinds on the windows. What do the windows look like from the other side? Whatever you put on the windows needs to look good from both sides. Personally, I would remove the glass from the windows and just have them as openings. I have this in my living room to my dining room, and I put corbels in the corners of the openings. What kind of privacy do you need between the two rooms?

Looks like a 12' door? If you have regular pinch-pleat drapes and want to stack off the glass that translates to about a 16' rod. You can find decorative traverse rods in that length here.