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":
Madison M Bacon
(Mar 1868 Jonesborough, Washington County, Tennessee, USA - 9 Apr 1947 Barren County, Kentucky, USA)
         ├─Jacob Robert (Jakie) Bacon
(21 Jul 1891 Barren County, Kentucky, USA - 28 Nov 1974 Jefferson County, Kentucky, USA)
         │ Nettie F Weathers
(30 Oct 1890 Indiana, USA - 19 Nov 1988 Garden City, Wayne County, Michigan, USA)
         │          ├─William Robert Bacon
(17 Jul 1919 Grant County, Indiana, USA - 5 Feb 2000 Jefferson County, Kentucky, USA)
         │          └─James Bacon
(Abt 1922 Iowa, USA - ??)
         ├─Martha Ann Bacon
(Barren County, Kentucky, USA;28 Mar 1894 - 5 Feb 1969)
         │ + Robert Henry Miller
(23 Feb 1889 Kentucky, USA - 6 Nov 1985 Barren County, Kentucky, USA)
         ├─Daisy Vera Bacon
(Barren County, Kentucky, USA;11 Jul 1898 - 3 Sep 1982)
         │ + Gilbert A Buchholz
(16 Nov 1897 South Dakota, USA - 1 Jun 1961 Barren County, Kentucky, USA)
         ├─Dexter A Bacon, Sr
(Barren County, Kentucky, USA;18 Jun 1905 - 23 Feb 1979)
         │ Helen E Miller
(Barren County, Kentucky, USA;29 Nov 1911 - 13 Oct 1996)
         │          ├─Dexter A Bacon, Jr
(Barren County, Kentucky, USA;17 Dec 1930 - 5 Feb 2013)