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":
Willem Pot
(Utrecht;ged.28 jun 1763 - 27 sep 1843)
Caatje de Waal (Utrecht;ged.24 okt 1766 - 29 sep 1810)(huw. 11 feb 1792 Utrecht)
   └─Nicolaas Pot (Utrecht;13 aug 1808 - 1 okt 1868)
    Johanna Maria Verheul (Utrecht;27 apr 1809 - 27 apr 1887)(huw. 14 sep 1831 Utrecht)
       └─Johanna Pot (Utrecht;1831 - 27 jun 1905)
        Cornelis van de Bilt (Utrecht;23 jan 1831 - 27 mrt 1901)(huw. 7 mei 1856 Utrecht)
           └─Johanna Maria van de Bilt (21 jul 1867 Utrecht - 3 okt 1936 Rotterdam)
            Martinus Bekker (28 nov 1866 Utrecht - 24 feb 1953 Rotterdam)(huw. 25 apr 1888 Utrecht)
                   │            ├─Senna van den Heuvel
                   │            ├─Zoë van den Heuvel
                   │            └─Luuk Johan van den Heuvel