Tracked Area Size request

Ola Master Ross,

I dont know if I can find this info into Mocha, but I would like to know the current size of “Surface Area” in a specific frame.

I have a tracked footage, I look the better frame with less perspective distortion which I will have the biggest “Surface Area”, I look into Mocha and find this info, (e.g. 300x200), the I can create in AE a exact and proportional composition to not have my image too distorted.

what I do now?
I open the .txt and I find manually the exact frame and I do some math.