In around 2006-2007/08, there were about 300 made men, including the Sicilian, and Calabrian factions, and about 2,000 associates.
Not even The Sixth Family dared to go
that far.
Just passing on info I have. Take it for what it is. I never read the Sixth Family.
If the Rizzutos had that many members and associates, they could have taken over New York instead of the other way around. You're probably confused with the Gambino or Genovese families.
In any case, I'm "extremely" sceptical about the reliability of that information.