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":
Maartje Geerts
(Mon 11 Sep 1786 Zaandam (NL) - Tue 12 Jun 1821 Koog aan de Zaan (NL))
Cornelis de Jager (Koog aan de Zaan (NL);Mon 12 Dec 1785 - Sat 29 May 1852)(m. 23 okt 1808 Zaandam (NL))
   ├─Guurtje de Jager (Sat 15 Apr 1809 Koog aan de Zaan (NL) - Sun 27 Mar 1836 Amsterdam (NL))
   ├─Cornelis de Jager (Thu 30 May 1811 Koog aan de Zaan (NL) - Mon 15 Jan 1877 Zaandam (NL))
   ├─Hillegont de Jager (Koog aan de Zaan (NL);Wed 28 Apr 1813 - Tue 5 Nov 1872)
   ├─Jan de Jager (Koog aan de Zaan (NL);Fri 27 Jan 1815 - Tue 24 Oct 1815)
   ├─Trijntje de Jager (Sun 10 Nov 1816 Koog aan de Zaan (NL) - Thu 25 Apr 1895 Zaandam (NL))
   ├─Jan de Jager (Koog aan de Zaan (NL);Sun 25 Apr 1819 - Fri 2 Apr 1858)
   │ Aagje de Roo (Thu 23 May 1822 Krommenie (NL) - Wed 31 Jan 1866 Koog aan de Zaan (NL))
   │ (m. Sun 16 Jun 1844 Wormerveer (NL))
   │    ├─Maartje de Jager (Sat 17 May 1845 Zaandam (NL) - Wed 7 Nov 1928 Zaandijk (NL))