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: John Griffin Nelson (Jun 1839 Indiana, USA - 28 Dec 1936 Crewe, Nottoway County, Virginia, USA)
Mother: Melissa Adelma Wright (2 Mar 1847 Maine, USA - 10 Mar 1945 Crewe, Nottoway County, Virginia, USA)
William Thompson Nelson
(1 Oct 1868 Somerset, St Croix County, Wisconsin, USA - 18 Jun 1958 Matoaca, Chesterfield County, Virginia, USA)
Maria Montgomery
(Abt 1874 Ireland - 1918 bur.Osceola, Polk County, Wisconsin, USA)
         ├─Marjorie Helen Nelson
(12 Mar 1907 Farmington, Polk County, Wisconsin, USA - 29 Mar 1969 Matoaca, Chesterfield County, Virginia, USA)
         │ + Russell I Burch
(18 Jan 1904 Texas, USA - 14 Jun 1974 Petersburg, Petersburg County, Virginia, USA)
         └─Robert Henry Nelson
(East Farmington, Polk County, Wisconsin, USA;17 Feb 1906 - 4 Jun 1906)