I would have thought the Sony A7(R) is one of the smallest full frams DSLRs in the market now?
Bought the Sony A7R for my wife which apparently uses the Nikon D800 sensor. The camera is very small compared to other DSLRs. She just uses the 35m prime lens and is very happy with it.
I know it is a different price range but I'm guessing if you want quality and size this is one to consider?