You want to make sure you are measuring exactly where the partitions will be placed because bathrooms are not always exactly square.
Toilet stall dimensions mm.
Arrangements shown for standard toilet stalls may be reversed to allow either a left or right hand approach.
The minimum width of the stall is 60 inches 1525 mm.
The minimum depth for a partition stall is 48 inches but the depth can be as much as 78 inches if necessary.
Overall bathroom sizes will vary based on the actual dimensions of bathroom fixtures.
However stall depth can be anywhere between 48 inches to 78 inches as needed.
The size and arrangement of the standard toilet stall shall comply with figure here under standard stall.
Partition stalls can have a minimum depth of 48 in most cases or up to 78 depth if needed.
Standard bathroom stall sizes rarely vary and tend to be 36 inches wide and 60 inches deep.
If the depth of a standard toilet stall is increased at least 3 in 75 mm then a floor mounted water closet may be used.
The location of the door is in front of the clear space and diagonal to the water closet with a maximum stile width of 4 inches 100 mm.
Requiring enough internal clear floor space for a wheelchair to make a 180 turn accessible bathrooms must have either a 60 152 5 cm diameter turning circle or a t shaped turning space located within a 60 152 5 cm square with a minimum of 36 91 4 cm wide arms.
Standard toilet stalls are 36 wide by 60 depth.
The international plumbing code also dictates that bathroom stalls must be at least 30 inches wide regardless of mounting style.