From Molecule Tiny Homes. Another angle of second loft. Love this staircase design in this tiny home and the openess of the ceiling but not that the plans aren't available to the public. Might have to incorporate it into one of the others to get it....hmmm
Here's one with the door at the thin end at 4ft x 8ft (122 x 244cm). A door opening outwards helps things along, as do shallow sinks. Another tip is to nestle the sink and toilet cistern into niches in the wall which means them stick out less into the room. The minimum width you can get away with is about 4ft (122cm).