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: Geert Lameijer
(12 Oct 1823 Finsterwolde, Groningen, Nederland - 07 Apr 1876 Finsterwolde, Groningen, Nederland)
Jantje Lameijer
(02 Mar 1852 Finsterwolde, Groningen, Nederland - 21 May 1886 Ganzedijk, Finsterwolde, Groningen, Nederland)
Jans van der Molen
(25 May 1852 Winschoten, Groningen, Nederland - 07 Jan 1901 Midwolda, Groningen, Nederland)
         ├─ Geert Thomas van der Molen
(19 Apr 1876 Ganzedijk, Finsterwolde, Groningen, Nederland -          │ 07 Sep 1877 Ganzedijk, Finsterwolde, Groningen, Nederland)
         ├─ Harm van der Molen
(02 Sep 1877 Ganzedijk, Finsterwolde, Groningen, Nederland - 03 Dec 1877 Ganzedijk, Finsterwolde, Groningen, Nederland)
         ├─ Geert Thomas van der Molen
(12 Nov 1878 Ganzedijk, Finsterwolde, Groningen, Nederland -          │ 27 Sep 1885 Ganzedijk, Finsterwolde, Groningen, Nederland)
         ├─ Berend van der Molen
(07 Oct 1881 Ganzedijk, Finsterwolde, Groningen, Nederland - 04 Feb 1882 Ganzedijk, Finsterwolde, Groningen, Nederland)
         ├─ Harm van der Molen
(07 Oct 1881 Ganzedijk, Finsterwolde, Groningen, Nederland - 04 Feb 1882 Ganzedijk, Finsterwolde, Groningen, Nederland)
         └─ Berend van der Molen
(21 Sep 1883 Ganzedijk, Finsterwolde, Groningen, Nederland - Yes, date unknown)