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":
         │          ├─ Christiaan Derks
(1752 Heiligerlee, Scheemda, Groningen, Nederland - Yes, date unknown)
         │          ├─ Evert Derks Strijker
(23 Nov 1753 Heiligerlee, Scheemda, Groningen, Nederland - 30 Nov 1817 Midwolda, Groningen, Nederland)
         │          │ Anna Geerts
(1765 Midwolda, Groningen, Nederland - 03 Apr 1804 Midwolda, Groningen, Nederland)
         │          │          ├─ Geert Everts
(11 May 1789 Midwolda, Groningen, Nederland - Yes, date unknown)
         │          │          ├─ Trijntje Everts Strijker
(08 Nov 1790 Midwolda, Groningen, Nederland - 30 Sep 1844 Midwolda, Groningen, Nederland) =>
         │          │          └─ Geert Everts Strijker
(15 Jan 1798 Midwolda, Groningen, Nederland - Yes, date unknown) =>
         │          │           + Harmke Harms Boer
(1799 Winschoten, Groningen, Nederland - Yes, date unknown)
         │          ├─ Grietjen Strijker
(05 Aug 1756 Heiligerlee, Scheemda, Groningen, Nederland - Yes, date unknown)
         │          ├─ Geesjen Derks Strijker
(15 Dec 1757 Heiligerlee, Scheemda, Groningen, Nederland - Yes, date unknown)
         │          └─ Loewert Derks Strijker
(24 Jan 1760 Heiligerlee, Scheemda, Groningen, Nederland - Yes, date unknown)
         └─ Tittie Christiaans Beijshuisen
(1722 Blijham, Wedde, Groningen, Nederland - 03 Mar 1808 Westerlee, Scheemda, Groningen, Nederland)
          Diever Geerts
(1730 Westerlee, Scheemda, Groningen, Nederland - Yes, date unknown)
                   └─ Grietje Tietjes Beishuizen
(1753 Heiligerlee, Scheemda, Groningen, Nederland -                     21 Jun 1824 Westerlee, Scheemda, Groningen, Nederland)
                    Berent Jans Kuiper
(1756 Winschoten, Groningen, Nederland - Yes, date unknown)
                             ├─ Tietje Berends Kuiper
(22 Nov 1789 Westerlee, Scheemda, Groningen, Nederland - Yes, date unknown)
                             │ + Gezien Hittjes van der Veen
(20 Apr 1795 Westerlee, Scheemda, Groningen, Nederland - Yes, date unknown)
                             ├─ Jan Berends Kuiper
(08 Dec 1791 Westerlee, Scheemda, Groningen, Nederland - Yes, date unknown)
                             └─ Diever Berends Kuiper
(12 Sep 1793 Westerlee, Scheemda, Groningen, Nederland - Yes, date unknown)