I measured these yeasr ago and decided they were very close to #6. It is my standard turnout, but again I don't use them for my yard ladder either.
I set my track spacing at 4 inches. On an earlier layout I used tighter spacing and ran into some problems with cars sideswiping if the track had any slight kinks. Also with 4 inches, I can usually see car numbers which is a must for my switching paperwork. I can also get my fingers in to rerail cars if necessary.
To get 4 inches I think you need to put a short section of straight track between each switch.
My guess is they might come to less than 3.5 inches if you just string them together without a spacer piece.
