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":
Simon de Vries
(Rotterdam;ged.12 okt 1677 - begr.11 dec 1709)
Anna Bosch (Rotterdam;ca. 1687 - begr.18 dec 1766)(huw. 16 sep 1704 Rotterdam)
   └─Maria de Vries (Rotterdam;ged.26 jun 1705 - begr.8 feb 1754)
    Matthijs van Oostenrijk (Rotterdam;ged.15 apr 1700 - begr.6 jul 1741)(huw. 13 mei 1725 Rotterdam)
    :   └─Katharina van Oostenrijk (Rotterdam;ged.31 jan 1726 - 26 feb 1791)
    :    Hendrik van Klaveren (ged.15 nov 1716 Kethel Zuid Holland - begr.27 jul 1753 Rotterdam)
    :    (huw. 21 mei 1747 Rotterdam)
    :       └─Dirk van Klaveren (ged.14 jan 1751 Rotterdam - 6 jun 1822 Haastrecht)