The Truly tiny banana plant is a super dwarf Cavendish sold under the name "Truly tiny".
The Super dwarf Cavendish can grow to up to 4' but usually does
not get any taller than 3' Depending on growing conditions some
only get to 2'
The super dwarf Cavendish and the dwarf Cavendish both grow
edible, unseeded fruit.
Beware of sellers offering seeds for these dwarf banana plants.
They are obviously not real.