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: Jelle Kleijn (Wed 07 May 1834 Ransdorp (NL) - Fri 19 Jun 1908 Zaandam (NL))
Mother: Maartje de Boer (Zaandam (NL);Sat 19 May 1832 - Sat 22 Mar 1884)
Wijgert Kleijn
(Zaandam (NL);Wed 3 May 1871 - Wed 9 May 1962)
Anna Margrieta Siegelaar (Sun 28 Feb 1869 Hoorn (NL) - Sat 8 Sep 1951 Zaandam (NL))
(m. Sun 3 May 1891 Zaandam (NL))
   ├─Florentius Kleijn (Sun 7 Feb 1892 Zaandam (NL) - ??)
   │ Duifje Anna Zoomer (Zaandam (NL);1896 - Sat 13 Mar 1937)