The walls or partitions shall begin at a height not more than 12 inches 305 mm from and extend not less than 60 inches 1524 mm above the finished floor surface.
Commercial bathroom size code.
A minimum space of 21 inches must be planned in front of lavatory toilet bidet and tub.
In a corner handicap stalls require a minimum of 60 x 60 compartment and is required with a minimum door size of 32 and the maximum size and more common is the 36 door.
A minimum space of 24 inches must be planned in front of a shower entry.