Originally Posted by
lomapaseo
Why??? with the same size passengers to fit through them
As currently designed the door is large, bigger than the other doors in fact, because of the fuselage curvatures.
Here's an example picture.
I don't know if a smaller door could be designed and still attach to the airframe structural members in a reasonable way (maybe tdracer knows). However certainly a door for the the current aperture for that doorway can't be anything the passenger could try to hold, I might guess it weighs over 80kg!
There has also got to be a (large, long) slide somewhere, at the moment it is on the inside in a bustle on the door and while it could be in the fuselage somewhere like the 767, there might not be that much space for it.