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":
Sophia Ault
(19 Dec 1894 Knox County, Tennessee, USA - 6 Nov 1918 Lenoir City, Loudon County, Tennessee, USA)
George Henry Fritts
(Lenoir City, Loudon County, Tennessee, USA;29 Jun 1890 - 12 Jun 1976)
         ├─John Henry Fritts
(5 May 1914 Lenoir City, Loudon County, Tennessee, USA - 17 Jun 1990)
         ├─Robert Ralph Fritts
(Lenoir City, Loudon County, Tennessee, USA;23 Feb 1916 - 23 Nov 2004)
         │ Velma Carrie Fritts
(6 Apr 1915 Roane County, Tennessee, USA - 25 Apr 1984 Loudon County, Tennessee, USA)
         │          ├─Gary Stephen Fritts
(8 Mar 1948 Lenoir City, Loudon County, Tennessee, USA - 15 Jul 2014 Sacramento County, California, USA)
         │          │ Living
         │           + Living
         └─Mary Blanche Fritts
(9 Apr 1917 Lenoir City, Loudon County, Tennessee, USA - 29 Jan 1990 Oak Ridge, Anderson County, Tennessee, USA)
          + Woodrow Wilson Gardner
(7 Nov 1916 Roane County, Tennessee, USA - 3 Jul 1975 Oak Ridge, Anderson County, Tennessee, USA)
          + Living