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 Wijker (Egmond aan Zee (NL);Fri 4 Aug 1815 - Thu 20 Feb 1868)
Mother: Neeltje Blok (Tue 3 Jun 1823 Egmond aan Zee (NL) - ??)
Kniertje Wijker
(Fri 17 Dec 1852 Egmond aan Zee (NL) - Thu 28 Oct 1915 Uitgeest (NL))
Willem Vlottes (Fri 10 Apr 1846 uitgeest (NL) - ??)(m. Sun 27 May 1877 Schoorl (NL))
   ├─Neeltje Vlottes (Sun 8 Feb 1891 Uitgeest (NL) - 1978)
   │ Aldert de Wit (Krommenie (NL);Sat 20 Jul 1889 - Wed 10 Apr 1957)(m. Sat 2 Aug 1913 Uitgeest (NL))