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":
    Elisabeth Debben (ged.27 jan 1677 Maarheeze - ??)(huw. 3 jul 1701 Maarheeze)
       └─Gerardus Smulders (ged.9 dec 1719 Maarheeze - begr.10 aug 1787 Amsterdam)
        + Christina Langeveldt (huw. 15 dec 1741 Amsterdam)
        Catharina Barens (Amsterdam;ged.19 jan 1731 - begr.29 feb 1788)
        (huw. 28 jun 1754 Amsterdam)
           └─Petronella Maria Smulders (ged.13 sep 1759 Amsterdam - begr.19 dec 1808 Nijkerk)
            Lambertus van Kalken (Nijkerk;ged.15 jul 1758 - 20 dec 1822)(huw. 12 dec 1790 Nijkerk)
               ├─Catharina van Kalken (ged.5 jun 1792 Nijkerk - 17 jan 1863 Utrecht)