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":
Cornelis Eland
(Sat 2 Dec 1815 Terheijden (NL) - Fri 22 Feb 1884 Klundert (NL))
Catharina van Beveren (Fri 22 Aug 1823 Zevenbergen (NL) - ??)(m. Fri 5 May 1843 Zevenbergen (NL))
   ├─Rochus Eland (Mon 4 Oct 1847 - Sun 13 Feb 1949 Fijnaart en Heijningen (NL))
   │ Hendrika Weeda (Sun 23 Feb 1845 Klundert (NL) - ??)(m. Fri 21 Oct 1870 Zevenbergen (NL))
   │    └─Cornelis Eland (Mon 20 Mar 1871 Fijnaart en Heijningen (NL) - Sun 20 Oct 1957 Breda (NL))
   │     Adriana Dalemans (Willemstad (NL);Mon 30 Jun 1873 - Sun 14 May 1916)
   │     (m. Sat 27 Apr 1895 Fijnaart en Heijningen (NL))