The Colombos are not 4 times the size of Chicago. If you add the soldiers into it, they are about the same size. The soldiers in Chicago are not made guys, that's why the number of made guys is small in Chicago which is a good thing.
You your self says the Outfit has about 40 made men and 120 associates. While i've seen estimates that the Colombos have 100 made men and 500 associates which would mean they are about 4 or maybe 3 times bigger.
