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":
         │          └─Pieter Foppe de Man
(15 aug 1765 's-Gravendeel - 30 jan 1817 Brussel (België))
         │           Elizabeth Kool
(ged.12 mrt 1775 Zwijndrecht - 09 apr 1847 's-Gravendeel)
         │                    ├─Gijsbert de Man
('s-Gravendeel;02 feb 1796 - 27 apr 1847) =>
         │                    │ + Elizabeth Pieter Zilverschoon
(05 mrt 1796 Puttershoek - 21 jun 1817 's-Gravendeel)
         │                    │ + Maria van Vessem
(Bruinisse;ged.02 mrt 1800 - 03 jun 1877)
         │                    ├─Pieter de Man
('s-Gravendeel;04 okt 1800 - 26 feb 1867) =>
         │                    │ + Lena Tak
('s-Gravendeel;09 jun 1798 - 05 jan 1872)
         │                    ├─Neeltje de Man
('s-Gravendeel;15 sep 1802 - 28 mrt 1867)
         │                    │ + Jan Jans de Vlaming
('s-Gravendeel;11 jan 1802 - 01 apr 1868)
         │                    ├─Grietje de Man
(05 aug 1805 's-Gravendeel - Ja, datum echter onbekend)
         │                    │ + Adrianus Broer
(21 dec 1801 's-Gravendeel - Ja, datum echter onbekend)
         │                    └─Fop de Man
('s-Gravendeel;31 mei 1810 - 26 sep 1859)