Are the bibs full lenght and are they...
Are the bibs full lenght and are they thermal?
I don't know how thermal they are, Castelli website rates them for between 50-60F. Knickers typically end somewhere around the mid calf.
They're not full length--see my photo in one of the reviews for an idea of the fit. You could probably comfortably wear these 10 degrees below Castelli's rating.