I'm aware of the 150 members estimates for the Bonannos by the early 2000s. I think they were a little inflated.

In 2001, the feds released a no contact list for Robert Lino that included all 111 known Bonanno members (including Lino himself oddly enough). Frank Lino testified the family had 12 captains and 100 soldiers in 2003. Add a 3 man administration and you're looking at 115 members. And wiretaps for the Basciano case in 2006 revealed the family had less than 100 soldiers then. Even if we go with 99 soldiers, and throw in another dozen or so administration and captains, it doesn't come to 150 members.