I have been wondering the same thing myself since day 1. Have been amazed that there has been no info. So I just put the address in a real estate website.
Total sq ft 1407 ..... Year built 1910......Assessed value 106K. 2 bedrooms 2 baths.
You can draw your own inference from this about the probable size of the bathroom.
Oh boy. I remember my friends and I would crowd into the bathroom, putting on makeup. 3 three of us, 2 standing up at the sink mirror, and another one sitting on the edge of the tub, or the toilet. This house was built in the 30's, so I can imagine this bathroom in question, was even worse than mine.