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":
Johanna Prins
(Sun 1 Mar 1903 Capelle aan de IJssel (NL) - Thu 9 Sep 1971 Rotterdam (NL))
Roeland Hartmans (Tue 13 Sep 1898 Fijnaart (NL) - Thu 26 May 1977 Rotterdam (NL))
(m. Thu 14 Apr 1921 Capelle aan de IJssel (NL))
   ├─Roeland Hartmans (Mon 10 Oct 1921 Capelle aan de IJssel (NL) - Wed 8 Dec 2010)
   ├─Adriana Antonia Hartmans (Capelle aan de IJssel (NL);Mon 20 Oct 1924 - Sat 6 Jan 2007)
   │ + Cornelis Opschoor (Mon 10 Jul 1922 Capelle aan de IJssel (NL) -    │ Tue 23 Jan 2001 bur.Capelle aan de IJssel (NL))(m. Thu 28 Apr 1949 Capelle aan de IJssel (NL))
   ├─Thomas Hartmans (Capelle aan de IJssel (NL);Thu 17 Jun 1926 - Fri 21 Jan 1927)