Above what sector length do you get an augmented crew?
billyb...if I may, since I'm "here"
There's no absolute answer since it depends on the likes of report time and previous rest as well as sector length.
As an example LHR/ORD/LHR is one of the longer non-augmented trips, whereas LHR/MIA/LHR is on the cusp and if scheduled as a 24 hour nightstop you'll be augmented, but if it is scheduled for a 48 hour slip then you are basic crew.