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: David Marshall McCutchan (10 Apr 1872 Leon, Decatur County, Iowa, USA - 19 Jul 1946 Medora, Billings County, North Dakota, USA)
Mother: Martha 'Mae' Gore (13 Oct 1882 Hamilton Twp, Decatur County, Iowa, USA - 25 Oct 1980 Dickinson, Stark County, North Dakota, USA)
Charles Orell McCutchan
(25 Jun 1914 Amidon, Slope County, North Dakota, USA - 3 Apr 2003 Medora, Billings County, North Dakota, USA)
Martha Marie Hoffer
(10 May 1920 Hebron, Morton County, North Dakota, USA - 5 Sep 2018 Belle Fourche, Butte County, South Dakota, USA)
         │ + Louis John Giacometto
(11 Jul 1942 Broadus, Powder River County, Montana, USA - 9 May 2011 Billings, Yellowstone County, Montana, USA)