I can't remember the age... not more than 1 1/2 years, should go check pictures and see if I can get a better idea. As for the size of bunch I think it'll be over 200 bananas, the first hand has about 32 or more and I can count 9 hands already. they are around 3" long, I don't think they'll get much longer.
My problem is "how much should I cut off?" I hate doing it but I think it's needed. The circumference is 27" about the same size as my big plants. In the ground makes bigger plants than container grown!
