7:1, My sides are at the midpoint of my two main rows. In side wall columns.
The ceilings are for the rears since I have no rear wall.
Overall I'm not really proud of the surround sound of my room. It tends to get a little lost.
There are several contributing factors, No rear wall, My sides are not bi/di-directional, My chairs are two high, the room is not symmetrical, and I have a cheap receiver.
But I still enjoy a good movie. I've been to a Dennis E designed theater (CurtisG) with Lexicon processing and Triad $$$ speakers and I was blown away.