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":
         ├─John Daniel Barkley
(Washington County, Tennessee, USA;9 Nov 1857 - 20 Dec 1943)
         │ + Amanda J Deakins
(7 Jul 1865 Washington County, Tennessee, USA - 1 Apr 1939 Telford, Washington County, Tennessee, USA)
         ├─William Burgess Barkley, IV
(2 Dec 1862 Washington County, Tennessee, USA - 3 Aug 1931 Bristol, Sullivan County, Tennessee, USA)
         │ Achsa Martin Hunt
(Abt 1870 Washington County, Tennessee, USA - 8 Jul 1928 Wallace, Washington County, Virginia, USA)
         │          ├─Mabel Barkley
(12 Aug 1892 Washington County, Tennessee, USA - 22 May 1960 Asheville, Buncombe County, North Carolina, USA)
         │          ├─Clyde Franklin Barkley
(3 Sep 1893 Washington County, Tennessee, USA - 2 Feb 1973 Asheville, Buncombe County, North Carolina, USA)
         │          ├─Anna J Barkley
(Dec 1895 Washington County, Tennessee, USA - ??)
         │          ├─Edna Barkley
(3 May 1898 Telford, Washington County, Tennessee, USA - 12 Oct 1941 Jefferson County, Kentucky, USA)
         │          ├─William Ingersol Barkley
(13 Aug 1900 Wallace, Washington County, Virginia, USA - Jan 1984 Columbia, Howard County, Maryland, USA)
         │          │ Rachel Celia Gibson
(28 Nov 1899 West Virginia, USA - May 1987 Columbia, Howard County, Maryland, USA)
         │          └─Juanita Barkley
(20 Sep 1908 Virginia, USA - 13 Jun 2007 San Jose, Santa Clara County, California, USA)
         │           Eustace Linwood Womack
(4 Sep 1907 Virginia, USA - May 1972 Florida, USA)
         ├─Katharine Jane (Kitty) Barkley
(15 Oct 1850 Telford, Washington County, Tennessee, USA -          │ 11 Dec 1915 Limestone, Washington County, Tennessee, USA)
         │ + Ethelbert Dudley Brabson
(12 Dec 1849 Tennessee, USA - 8 Feb 1917 Greeneville, Greene County, Tennessee, USA)
         ├─Samuel Keebler Barkley
(Washington County, Tennessee, USA;6 Feb 1855 - 2 Mar 1907)
         │ Elizabeth Achsah Bowman
(2 Oct 1859 Washington County, Tennessee, USA - 3 Oct 1938 Johnson City, Washington County, Tennessee, USA)
         │          ├─Anna May Barkley
(Washington County, Tennessee, USA;16 Oct 1878 - 17 Oct 1878)
         │          ├─Benjamin Orville Barkley
(23 Feb 1880 Washington County, Tennessee, USA -          │          │ 7 Jan 1964 Jonesborough, Washington County, Tennessee, USA)
         │          ├─Ralph Ingersol Barkley
(9 Jun 1882 Washington County, Tennessee, USA - 23 Feb 1965 Tennessee, USA)
         │          │ + Susan S ??
(1890 Virginia, USA - 1974 bur.Monte Vista Memorial Park, Johnson City, Washington County, Tennessee, USA)
         │          ├─Roy Burgess Barkley
(14 Nov 1884 Washington County, Tennessee, USA - Mar 1970)
         │          ├─Beryle S Barkley
(Washington County, Tennessee, USA;21 May 1887 - 13 Jun 1961)
         │          ├─Samuel Keebler Barkley, Jr
(Washington County, Tennessee, USA;16 Mar 1894 - Mar 1963)
         │          │ + Dora Ethel Laughrun
(16 Aug 1898 Unicoi County, Tennessee, USA - 26 Dec 1985 Erwin, Unicoi County, Tennessee, USA)
         │          ├─Bessie Bowman Barkley
(Washington County, Tennessee, USA;27 Oct 1889 - 1921)
         │          └─Frederick Barkley
(Washington County, Tennessee, USA;15 Apr 1904 - 27 Nov 1904)
         └─Matthew Barkley
(Limestone, Washington County, Tennessee, USA;15 Oct 1860 - 15 Oct 1860)