You can pull up the full parts list on Airstream dot com website.
It does say that the bathroom door is 22 inches.
We use a standard wooden baby gate for our golden retriever. At night he sleeps by the front door and we put the gate up so that we can still juuuust open the bathroom door (so we don't have to climb over a sleeping dog at night).
We can still easily reach over to open the door should we need to get out quickly.
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