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":
        Cornelis Tewes (Schiedam;ged.21 aug 1767 - 12 dec 1817)(huw. Ja, datum echter onbekend)
           └─Elizabeth Tewes (22 mei 1795 Delfshaven - 3 feb 1863 Schiedam)
            Johannes Verbrugge (31 jan 1807 Oud en Nieuw Mathenesse - 25 nov 1848 Schiedam)
            (huw. 3 nov 1831 Schiedam)
               └─Johannes Verbrugge (28 feb 1835 Schiedam - 28 dec 1879 Rotterdam)
                Pleuntje Burger (Rotterdam;31 mrt 1840 - 18 jun 1894)(huw. 17 feb 1869 Rotterdam)