To correctly determine the size of a rough opening for double or french doors measure the size of each door.
Normal size for french doors.
So if each door measures 30 inches wide the width of the rough opening should be 62 inches.
Now you need to determine the height of the french door with the same procedure and deduct 10 millimetres from the smaller value.
Your measured height is 132 0 cm.
The sizes that your french doors come in will be set by the manufacturer but they are generally between 30 and 72 inches wide per door.
The width had the dimension 124 0 cm in the upper section and 123 0 in the lower.
And generally are available in 2 inch increments.
Standard door sizes start at 1 foot 6 inches and are offered at 2 inch increases to 3 feet wide.
The door used to go inward into the closer since the hallway between the two closets was too skinny for them to go outward.
Fitting with standard door openings stock door heights are 6 feet 8 inches.
If you live in an older house or have an unusual door opening there are manufacturers who offer custom sizes.
96 inches or 8 ft.
French doors the standard size for an exterior door is 80 inches by 36 inches which is 6 ft 8 inches by 3 ft.
Deduct 10 mm from this value and the measurement will be 131 0 cm.
Is now very common for newer homes and stock exterior doors are also commonly available in 30 and 32 inch widths.