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: Paul Datema
(Abt 1689 Sandebuur, Roden, Drenthe, Nederland - Yes, date unknown)
         │          ├─ Jan Bakes Datema
(1781 Roderwolde, Roden, Drenthe, Nederland - 28 Dec 1835 Hoogemeeden, Aduard, Groningen, Nederland)
         │          │ Antje Bernardus Sonius
(1778 Noordhorn, Zuidhorn, Groningen, Nederland - 15 May 1853 Foxwolde, Roden, Drenthe, Nederland)
         │          │          ├─ Grietje Datema
(07 Apr 1808 Wierum, Adorp, Groningen, Nederland - Yes, date unknown)
         │          │          ├─ Bernardus Jans Datema
(25 Jul 1810 Wierum, Adorp, Groningen, Nederland - 22 Dec 1855 Oldekerk, Groningen, Nederland) =>
         │          │          │ + Margrieta Holthuis
(01 Mar 1817 Zuidbroek, Groningen, Nederland - 26 Jan 1902 Zuidhorn, Groningen, Nederland)
         │          │          ├─ Jantje Datema
(08 Oct 1812 Wierum, Adorp, Groningen, Nederland - Yes, date unknown)
         │          │          ├─ Bake Jans Datema
(16 Dec 1815 Oostum, Ezinge, Groningen, Nederland - Yes, date unknown)
         │          │          └─ Geertruid Datema
(01 Feb 1820 Wierum, Adorp, Groningen, Nederland -          │          │           25 Aug 1823 Hoogemeeden, Aduard, Groningen, Nederland)
         │          ├─ Hendrik Datema
(1784 Roderwolde, Roden, Drenthe, Nederland - Yes, date unknown)
         │          └─ Pouwel Datema
(1788 Roderwolde, Roden, Drenthe, Nederland - Yes, date unknown)
         └─ Wemeltje Datema
(1760 Roderwolde, Roden, Drenthe, Nederland - Yes, date unknown)