This past Wednesday (10/5/2016), I picked up a Truly Tiny, Dwarf Orinoco, and a Raja Puri. ... Left to right in picture. Also a Meyer lemon ( not pictured).
The TT stem is 12 in tall; the Dwarf Orinoco pstem is 32 in (all 4 ft over all); and the Raja pstem is 24 in (3ft over all). The 1 gal. pots of the Dwarf Orinoco & Raja were full of roots. So I believe these plants are close to 2 years old.
I'll go back to this nursery next week for a couple more banana plants.