The paper length is not relevant since the chart flows from one page to the next.
Mobile
in.
mm
Portrait
2.75
70
For smart phones, not for printing
Landscape
5.5
140
For smart phones, not for printing
USA & Canada
in.
mm
Letter Portrait
8.5
216
Also Legal Portrait
Letter Landscape
11
279
Legal Landscape
14
356
Also Ledger Portrait
Ledger Landscape
17
432
International
in.
mm
A5 Portrait
5.82
148
A4 Portrait
8.25
210
Also A5 Landscape
A4 Landscape
11.71
297
Also A3 Landscape
A3 Landscape
16.54
420
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":
Mother: Maria Gijswijt (Amsterdam (NL);chr.Sun 17 Jan 1779 - Tue 13 Apr 1830)
Pieter Croese
(Amsterdam (NL);Wed 25 Nov 1818 - Tue 4 Aug 1868)
Trijntje Roetenbeek (Amsterdam (NL);Sat 20 Jun 1818 - Mon 25 Sep 1882)(m. Wed 25 Jan 1843 Amsterdam (NL))
   ├─Pieter Croese (Fri 3 Nov 1843 Amsterdam (NL) - Sat 10 Jun 1905 Amersfoort (NL))
   │ + Christina Claristel Sophia Maria Sandbrink (Thu 26 Dec 1822 Ambt Haren - Fri 22 Dec 1893 Hilversum (NL))
   │ : (m. Sat 6 Apr 1889 Hilversum (NL))
   │ + Johanna Wellerd (Amersfoort (NL);Wed 12 Aug 1846 -    │ Thu 6 Mar 1913)(m. Wed 27 Jan 1897 Amersfoort (NL))
   ├─Clara Croese (Amsterdam (NL);Thu 22 May 1845 - Sat 28 Jan 1922)
   ├─Bernardus Croese (Amsterdam (NL);Thu 15 Oct 1846 - Fri 5 Mar 1847)