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":
    Hendrik van Gennip (14 dec 1840 Hellum (gem. Slochteren) - 19 aug 1913 Leermens (gem. 't Zandt))
    (huw. 20 jan 1866 't Zandt)
       └─Geert van Gennip (14 feb 1875 Leermens (gem. 't Zandt) - 23 mrt 1919 't Zandt)
        Katrina van Kalker (27 mrt 1873 Loppersum - 3 apr 1921 't Zandt)(huw. 14 nov 1896 't Zandt)
           └─Enje van Gennip (5 dec 1905 - 1 feb 1946)
            Willem Dijkhuis (29 apr 1901 Broich, Aachen, Nordrhein-Westfalen (Duitsland) -             30 dec 1980 Spijk (gem. Bierum))(huw. 11 mei 1928 't Zandt)
               └─Geert Dijkhuis (24 jun 1930 Bierum - 10 jun 2017 Spijkenisse) =>