The paper length is not relevant since the chart flows from one page to the next.
Mobile
in.
mm
Staand
2.75
70
For smart phones, not for printing
Liggend
5.5
140
For smart phones, not for printing
International
in.
mm
A5 Staand
5.82
148
A4 Staand
8.25
210
Also A5 Liggend
A4 Liggend
11.71
297
Also A3 Liggend
A3 Liggend
16.54
420
USA & Canada
in.
mm
Letter Staand
8.5
216
Also Legal Staand
Letter Liggend
11
279
Legal Liggend
14
356
Also Ledger Staand
Ledger Liggend
17
432
The Text+ programs assume that the right and left margins are each about 25mm (1/2 inch) wide.
On the Format for Printing page, differences in page margins can be accommodated by the "fudge factor":
Vader: Jacobus Moll (Rotterdam;ged.3 jun 1714 - begr.1 jul 1782)
       │ Johannes Eduard Jansen (19 mei 1801 Rotterdam -        │ na 1845 Verenigde Staten van Amerika, State of New York)(huw. 11 mei 1826 Sprang)
       │    │    │ + François Theodor Peuchen (21 aug 1861 Batusangkar, Tanah Datar, West Sumatra, Indonesië -        │    │    │ 31 dec 1914 Rotterdam)(huw. 27 aug 1908 Rotterdam)
       │    │    ├─Johan Willem Nicolaas Jansen (19 jan 1867 Rotterdam - 28 nov 1960 Zeist)
       │    │    │ + Henriette Louise van Boeckholt (22 feb 1863 Toboali (Ned. NO Indië) -        │    │    │ 30 aug 1949 Schiedam)(huw. 3 nov 1892 Rotterdam)