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":
Father: Jan Claasz Hopman (Mon 10 Jun 1754 Wijk aan Zee en Duin (NL) - Wed 7 Nov 1821 Egmond aan Zee (NL))
Mother: Antje Gerrits de Groot (1759 Alkmaar (NL) - Fri 29 Apr 1814 Egmond aan Zee (NL))
Klaas Jansz Hopman
(chr.Sat 22 Aug 1789 Egmond Binnen (NL) - Mon 10 Sep 1849 Egmond aan Zee (NL))
Trijntje Leenderts Blok (Egmond aan Zee (NL);Wed 16 Oct 1793 - Sun 24 Nov 1861)
(m. Sat 31 Dec 1814 Egmond aan Zee (NL))
   ├─Antje Hopman (Egmond aan Zee (NL);Wed 28 Dec 1814 - Sat 15 Apr 1815)
   ├─Jan Hopman (Egmond aan Zee (NL);Fri 9 Aug 1816 - Fri 21 Aug 1818)
   │ Hendrika de Graaff (Tue 4 Jan 1820 Egmond aan Zee (NL) - Sun 4 Dec 1887 Den Helder (NL))
   │ (m. Sun 7 Feb 1841 Egmond aan Zee (NL))
   │    ├─Jan Hopman (Mon 31 May 1841 Egmond aan Zee (NL) - Wed 18 Dec 1918 Alkmaar (NL))
   │    │ + Catharina Cornelia Stadegaart (Mon 16 Sep 1839 Alkmaar (NL) - > 1882)(m. Sun 29 May 1881 Alkmaar (NL))
   │    │ + Betje Dekker (Fri 17 Oct 1845 Egmond aan Zee (NL) -    │    │ Sun 9 May 1880 Alkmaar (NL))(m. Sun 9 Jun 1872 Egmond aan Zee (NL))
   │    ├─Arie Hopman (Tue 25 Oct 1842 Egmond aan Zee (NL) - Thu 14 Oct 1915 Wijk aan Zee (NL))
   │    │ Antje Brasser (Sun 18 Dec 1853 Wijk aan Zee (NL) - > 1889)(m. Fri 5 Sep 1879 Wijk aan Zee (NL))
   │    │    └─Hendrika Maria Hopman (Thu 4 Sep 1879 Wijk aan Zee (NL) - Sun 22 Mar 1925 Haarlem (NL)) =>
   │    │     + Josephus Cornelis Swaalf (Haarlem (NL);Tue 4 Dec 1877 - Wed 6 Jan 1960)
   │    │     (m. Wed 24 Oct 1900 Haarlem (NL))