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: Cornelis Croes (chr.Tue 17 Jan 1741 b.Heusden (NL) - Tue 9 Dec 1800 Amsterdam (NL))
   │ Marie Claire Dumas (Tue 12 Apr 1808 Rotterdam (NL) - ??)(m. Wed 31 May 1837 Rotterdam (NL))
   │    ├─Anna Maria Croes (Rotterdam (NL);Sun 22 Oct 1837 - Wed 26 Feb 1908)
   │    │ + Cornelis Struijk (Tue 24 Jun 1845 Rotterdam (NL) - Fri 4 Jun 1926 Poortugaal (NL))
   │    │ (m. Wed 14 Aug 1867 Rotterdam (NL))
   │    ├─Neeltje Croes (Rotterdam (NL);Fri 28 Feb 1840 - Sat 16 Jan 1886)
   │    │ + Dirk Palli (Sat 13 Apr 1839 Rotterdam (NL) - Fri 10 Feb 1882 Utrecht (NL))
   │    │ : (m. Wed 23 Dec 1863 Rotterdam (NL))
   │    │ + Adolf van Rooyen (Rotterdam (NL);Thu 14 Mar 1839 - Sun 28 Sep 1902)
   │    │ (m. Wed 28 Feb 1883 Rotterdam (NL))
   │    └─Hendrik Croes (Rotterdam (NL);Tue 17 Nov 1846 - Thu 8 Mar 1849)
   ├─Alida Croes (Rotterdam (NL);Wed 29 Aug 1810 - Thu 13 Feb 1879)
   │ + Adam Adrianus van Duivenbode (Rotterdam (NL);Mon 21 Aug 1820 - Tue 27 Feb 1872)
   │ (m. Wed 22 Mar 1843 Rotterdam (NL))
   ├─Anna Maria Croes (Rotterdam (NL);Wed 19 May 1813 - Wed 6 Aug 1851)
   │ + Jan de Vogel (Rotterdam (NL);Mon 4 Oct 1802 - Thu 13 Feb 1840)(m. Wed 29 Mar 1837 Rotterdam (NL))
   │ + Cornelis van Hoewijk (Rotterdam (NL);Wed 19 Jun 1822 - Tue 11 Oct 1898)
   │ (m. Wed 31 Aug 1842 Rotterdam (NL))
   └─Elizabeth Croes (Rotterdam (NL);Wed 1 Jan 1817 - Sat 27 Mar 1819)