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":
Martha Ellen Geren
(11 Nov 1868 Bradley County, Tennessee, USA - 11 Apr 1951 Madera, Madera County, California, USA)
Gilmore MacLean Wattenbarger
(2 Sep 1869 Bradley County, Tennessee, USA - 14 Oct 1940 Madera, Madera County, California, USA)
         ├─William Ernest Wattenbarger
(4 Sep 1895 Cleveland, Bradley County, Tennessee, USA - 22 Apr 1980 Madera, Madera County, California, USA)
         │ Alice Helen Lewis
(26 May 1904 New York, USA - 16 Nov 1992 Madera, Madera County, California, USA)
         ├─Margaret Susan Wattenbarger
(2 Sep 1897 Cleveland, Bradley County, Tennessee, USA - 29 Mar 1989 Madera, Madera County, California, USA)
         │ Charles Ira Foust
(23 Dec 1891 Missouri, USA - 13 Dec 1958 Fresno, Fresno County, California, USA)
         │          └─Charles E Foust
(Abt 1921 California, USA - ??)
         ├─Robert Elmer Wattenbarger
(4 Dec 1899 Bradley County, Tennessee, USA - 17 Jan 1976 Madera, Madera County, California, USA)
         │ Violet Mae Lamb
(20 Nov 1908 Michigan, USA - 15 Jun 1975 Santa Ana, Orange County, California, USA)
         └─Roy Maxwell Wattenbarger
(10 Jul 1907 Ephrata, Grant County, Washington, USA - 23 Oct 1972 San Jose, Santa Clara County, California, USA)
          Amelia Alicia (Emily Alice) Souza
(15 Dec 1904 Mill Valley, Marin County, California, USA -           8 Aug 1996 Scotts Valley, Lake County, California, USA)
                   └─Robert Mark Wattenbarger
(21 Sep 1948 San Francisco, San Francisco County, California, USA -                     25 Jun 1990 Chico, Butte County, California, USA)