Predicting your final pattern of balding

I’m 25 and I have a Norwood 2 and I’m just wondering at what age is your final Norwood apparent or predictable?

For most men, hair loss patterns can be picked up by the age of 26 with proper tools (Microscopic imaging and micrometers); however, this is not a 100% rule as I have seen men start their balding in their 30s, 40s, and even in the 50s.