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":
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┌──Thompson Nelson
(12 Jan 1811 Point Pleasant, Mason County, West Virginia, USA - 17 Sep 1884 Wisconsin, USA)
│ │
│ │ ┌──William Arbuckle
(3 Mar 1752 Balcony Falls, Rockbridge County, Virginia, USA - │ │ │ 21 Mar 1836 Mason County, West Virginia, USA) =>
│ └──Mary (Polly) Dickinson Arbuckle
(4 Apr 1784 Fort Randolph, Point Pleasant, Mason County, West Virginia, USA - │ 13 Sep 1847 Pendleton, Madison County, Indiana, USA)
│ └──Catherine Madison
(1754 Augusta County, Virginia, USA - 18 Jul 1818 Buffalo, Putnam County, West Virginia, USA) =>
│
┌──John Griffin Nelson
(Jun 1839 Indiana, USA - 28 Dec 1936 Crewe, Nottoway County, Virginia, USA)
│ └──Mary Ann Greenlee
(1814 West Virginia, USA - 30 Apr 1898 Spooner, Washburn County, Wisconsin, USA)
│
┌──Miles Asa Nelson
(19 Oct 1876 Farmington, Polk County, Wisconsin, USA - 5 Jul 1971 Cook, St Louis County, Minnesota, USA)
│ └──Melissa Adelma Wright
(2 Mar 1847 Maine, USA - 10 Mar 1945 Crewe, Nottoway County, Virginia, USA)
│
John Louis Nelson (16 Sep 1912 Bear River, St Louis County, Minnesota, USA - 19 Sep 1990 Kingsville, Kleberg County, Texas, USA)
└──Randa 'Mathilda' Wold
(27 Mar 1890 Minneapolis, Hennepin County, Minnesota, USA - 3 Mar 1957 Itasca County, Minnesota, USA)