What is standard door width
How to Measure a Door? What is standard door width? : What Is Standard Door Width
Quote from Article entitled How to Measure a Door? What is standard door width?:
With the double door design, there is no standard door width. This is because more often than not, they are custom made. You therefore have the freedom to choose whatever size you wish to have on your home or commercial building.
The full version of the article can be found here.