Burmese python size

[AbsoluteApril]

Well mine is an F2 which I think refers to both his parents and their parents all being Dwarfs .

to clarify F1, F2, etc:
It stands for 'filial generation'
F1 is the offspring of an original pairing
F2 is the offspring of those babies when they are bred together.
F3 is the offspring of those babies, etc etc
It notates interbreeding, breeding siblings together, which as we understand in reptiles is generally not genetically bad for a few generations.

If you bred an F1 to an unrelated snake, those new babies would be F1s from that pairing.
I hope that helps!