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":
                   │ :         │ + Baje Zwierts de Boer
(22 Jun 1789 Tripscompagnie, Sappemeer, Groningen, Nederland -                    │ :         │ 04 May 1866 Borgercompagnie, Veendam, Groningen, Nederland)
                   │ :         └─ Meike Aljes Mulder
(1791 Sappemeer, Groningen, Nederland - Yes, date unknown)
                   │ :          + Meerten Derks Ubbens
(1796 Sappemeer, Groningen, Nederland - Yes, date unknown)
                   │ + Richt Eppes Mulder
(Abt 1752 Noordbroek, Groningen, Nederland - Yes, date unknown)
                   └─ Jan Hansens Kneubel
(Cal 1754 Sappemeer, Groningen, Nederland - 05 Dec 1816 Hoogezand, Groningen, Nederland)
                    Annegien Berents
(1773 Veendam, Groningen, Nederland - 12 Jan 1851 Hoogezand, Groningen, Nederland)
                             ├─ Johannes Jans Kneubel
(28 Oct 1803 Kalkwijk, Hoogezand, Groningen, Nederland -                              │ 11 Dec 1869 Borgercompagnie, Sappemeer, Groningen, Nederland) =>
                             │ + Elsien Pieters Leenderts
(16 Nov 1799 Borgercompagnie, Muntendam, Groningen, Nederland -                              │ : 01 May 1834 Muntendam, Groningen, Nederland)
                             │ + Niessien Hindriks Maathuis
(21 May 1815 Muntendam, Groningen, Nederland -                              │ 04 Jun 1880 Sappemeer, Groningen, Nederland)
                             └─ Meike Kneubel
(16 Aug 1806 Sappemeer, Groningen, Nederland - Yes, date unknown)