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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┌──Solomon Andrew Sims
(11 Jul 1905 Texas, USA - 25 Dec 1980 Cleburne, Johnson County, Texas, USA)
Priscilla Ann Sims (4 Jun 1931 Wichita Falls, Wichita County, Texas, USA - 2 Dec 2007 Cleburne, Johnson County, Texas, USA)
│ ┌──Samuel David Richmond
(1815 Virginia, USA - 1863 Bradley County, Tennessee, USA)
│ ┌──Christopher Columbus (Lum) Richmond
(1 Dec 1849 Cleveland, Bradley County, Tennessee, USA - │ │ 26 Apr 1928 Poteau, Le Flore County, Oklahoma, USA)
│ │ └──Mary Hughes
(Abt 1820 Tennessee, USA - Aft 1880 Cleveland, Bradley County, Tennessee, USA)
│ │
│ ┌──Benjamin Harrison Richmond
(28 Dec 1888 Hon, Scott County, Arkansas, USA - 23 Mar 1961 El Paso, El Paso County, Texas, USA)
│ │ └──Queen Easter Elizabeth Stuart
(22 Aug 1852 Bradley County, Tennessee, USA - 23 Apr 1939 Poteau, Le Flore County, Oklahoma, USA)
│ │
└──Juanita Elizabeth Richmond
(12 Apr 1912 Wichita Falls, Wichita County, Texas, USA - 12 Jan 1998 Waco, McLennan County, Texas, USA)
└──Mattie Calhoun
(12 Sep 1888 Arkansas, USA - 6 Jan 1967 Wichita Falls, Wichita County, Texas, USA)