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":
Lizzie Bell Morgan
(13 Jan 1884 Wills Point, Van Zandt County, Texas, USA - 28 Sep 1968 Texas City, Galveston County, Texas, USA)
Charles Reeves Barger
(24 Aug 1884 Texas, USA - 8 Jun 1955 Galveston, Galveston County, Texas, USA)
         ├─Raymond B Barger
(8 Apr 1915 Greenville, Hunt County, Texas, USA - 2 Sep 1999 Ben Wheeler, Van Zandt County, Texas, USA)
         ├─Earnest Barger
(1918 Oklahoma, USA - ??)
         ├─Mildred Inez Barger
(1 May 1919 Oklahoma, USA - 3 Nov 1986 Galveston County, Texas, USA)
         │ + Landon McKee Kelsey, Jr
(3 Jul 1916 Galveston, Galveston County, Texas, USA - Aug 1986 La Marque, Galveston County, Texas, USA)
         ├─Warren Marshall Barger
(7 Aug 1905 Texas, USA - 16 Apr 1947 Texas City, Galveston County, Texas, USA)
         ├─Vera Barger
(1908 Dallas, Dallas County, Texas, USA - ??)
         ├─Richard Maple Barger
(12 May 1909 Oklahoma, USA - 7 Jan 1995 Van Zandt County, Texas, USA)
         ├─Willie B Barger
(5 Jul 1911 Erick, Beckham County, Oklahoma, USA - 3 Dec 1965 Houston, Harris County, Texas, USA)
         └─Corene Josephine Barger
(19 Apr 1913 Oklahoma, USA - 15 Dec 2004 Alvin, Brazoria County, Texas, USA)