Originally Posted by
Antarius
The type III overwing exit is 20 inches wide. So yes, with a seat belt extender need, the likelihood of being able to quickly open and exit is greatly reduced.
It would be even harder on the a320 overwing as that requires someone to maneuver the door after removal prior to exiting.
You're supposed to use the overwing exits with leg-body-leg motion, effectively sideways, so one's waist size is not a concern.
That 30lb door is going to be an issue for anyone if they never had to hoist it, regardless of whether they use an extender or not.