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":
         │          ├─ Geessien Helweg
(07 Aug 1899 Beerta, Groningen, Nederland - 04 Sep 1899 Beerta, Groningen, Nederland)
         │          ├─ Geessien Helweg
(08 Feb 1901 Beerta, Groningen, Nederland - Yes, date unknown)
         │          │ + Lammert Korthuis
(29 Sep 1899 Finsterwolde, Groningen, Nederland - Yes, date unknown)
         │          ├─ Seiko Helweg
(15 May 1902 Beerta, Groningen, Nederland - 05 Sep 1902 Beerta, Groningen, Nederland)
         │          ├─ Seiko Helweg
(08 May 1903 Beerta, Groningen, Nederland - 16 Aug 1903 Beerta, Groningen, Nederland)
         │          ├─ Abeltje Helweg
(17 Jul 1904 Beerta, Groningen, Nederland - 22 Oct 1904 Beerta, Groningen, Nederland)
         │          ├─ Jantje Helweg
(19 Jul 1906 Beerta, Groningen, Nederland - 13 Nov 1938 Beerta, Groningen, Nederland)
         │          │ + Roelf Koning
(18 Sep 1908 Beerta, Groningen, Nederland - Yes, date unknown)
         │          ├─ Seiko Helweg
(28 Dec 1907 Beerta, Groningen, Nederland - 05 Jun 1908 Beerta, Groningen, Nederland)
         │          └─ Geertruida Helweg
(16 Feb 1910 Beerta, Groningen, Nederland - 08 Jun 1911 Beerta, Groningen, Nederland)
         ├─ Geert Helweg
(04 May 1880 Beerta, Groningen, Nederland - Yes, date unknown)
         │ Lena Kamp
(25 Mar 1877 Finsterwolde, Groningen, Nederland - 16 Jun 1938 Beerta, Groningen, Nederland)
         │          ├─ Japien Helweg
(03 Oct 1899 Finsterwolde, Groningen, Nederland - Yes, date unknown)
         │          │ + Herman Schudde
(07 Mar 1902 Delfzijl, Groningen, Nederland - Yes, date unknown)
         │          ├─ Seiko Helweg
(30 Apr 1902 Beerta, Groningen, Nederland - Yes, date unknown)
         │          ├─ Hinderikus Helweg
(14 Feb 1904 Beerta, Groningen, Nederland - Yes, date unknown)
         │          │ + Jakobina Perdok
(1914 Wilhelmshaven, Niedersachsen, Deutschland - Yes, date unknown)
         │          └─ Hinderktje Helweg
(06 Feb 1906 Beerta, Groningen, Nederland - Yes, date unknown)
         │           + Bouko van der Kamp
(13 Jul 1908 Midwolda, Groningen, Nederland - Yes, date unknown)
         ├─ Jantje Helweg
(12 Feb 1883 Beerta, Groningen, Nederland - 24 Oct 1956 Beerta, Groningen, Nederland)
         ├─ Geertruida Helweg
(06 Oct 1885 Beerta, Groningen, Nederland - 10 Sep 1947 Vriescheloo, Bellingwolde, Groningen, Nederland)
         │ + Hommo Pater
(24 Jun 1884 Winschoten, Groningen, Nederland - Yes, date unknown)
         ├─ Hinderikus Helweg
(30 May 1891 Winschoten, Groningen, Nederland - 18 Mar 1903 Winschoten, Groningen, Nederland)
         ├─ Stientje Helweg
(26 Aug 1892 Winschoten, Groningen, Nederland - Yes, date unknown)
         ├─ Seiko Helweg
(02 Jan 1895 Winschoten, Groningen, Nederland - 13 Jul 1932 Beerta, Groningen, Nederland)
         ├─ Derk Helweg
(28 Jun 1897 Winschoten, Groningen, Nederland - Yes, date unknown)
         │ + Harmke Kolkman
(27 Jul 1898 Beerta, Groningen, Nederland - Yes, date unknown)
         ├─ Martje Helweg
(04 Jun 1899 Winschoten, Groningen, Nederland - Yes, date unknown)
         └─ Berend Helweg
(24 Mar 1901 Winschoten, Groningen, Nederland - Yes, date unknown)