On the masonite website it shows their standard sizes for interior french doors to be 12 16 18 or larger.
Normal size for french doors patio.
Place the hinged side where the swing is most convenient.
However i would not recommend a full glass door at the top of a stairs.
Patio french doors often open on to a deck or a backyard patio and may be used with a screen door system.
You will find the two and three panel patio door configurations which have different widths.
French doors are used as both entry patio doors and as interior doors that separate two spaces.
A slider saves space indoors and out.
These doors are popular because they allow some privacy while allowing a visual connection between two spaces.
If you are choosing the two panel keep in mind that the standard width is 5 feet or 60 inches.
The standard size of a sliding door or french exterior door there are some standard guidelines for the dimensions of a door.
When you said french doors i assumed that you wanted them with glass since that is what a french door is.
200 series hinged patio doors in vinyl clad wood.
The standard height of a patio door is 80 inches 6 feet 8 inches.
Prehung pair from 2 470.
Single slider courtesy of pella.
But just like how no home is the same no door is quite the same either.
You would need 2 15 s or a tad smaller for your space.
But width sizes vary and depend primarily on the patio door s configuration.