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":
Father: James Arthur (Archie) Horton (8 Aug 1848 Tennessee, USA - 12 Aug 1909 Fletcher, Comanche County, Oklahoma, USA)
Mother: Mary Elizabeth McClung (16 Jan 1848 Alabama, USA - 27 Feb 1885 Hillsboro, Hill County, Texas, USA)
Cora May Horton
(19 Jan 1882 Hillsboro, Hill County, Texas, USA - 26 Jan 1949 Lawton, Comanche County, Oklahoma, USA)
Homer Absolm Barker
(7 May 1872 Wise County, Texas, USA - 1 Mar 1943 Lawton, Comanche County, Oklahoma, USA)
         ├─Samuel Barker
(19 Jan 1903 Fletcher, Comanche County, Oklahoma, USA - 25 Jan 1999 Oklahoma City, Oklahoma County, Oklahoma, USA)
         │ Gladys Mae Little
(1902 Oklahoma, USA - 9 Jan 1983 Van Zandt County, Texas, USA)
         │          ├─Wayne Little Barker
(15 Sep 1933 Wewoka, Seminole County, Oklahoma, USA - 7 May 1963 Posey County, Indiana, USA)
         │          └─Robert Jack Barker
(14 Feb 1940 Illinois, USA - 4 Dec 2008 Plano, Collin County, Texas, USA)
         ├─Laurence Barker
(19 Apr 1906 Comanche County, Oklahoma, USA - 9 Jan 1984 Santee, San Diego County, California, USA)
         │ + Lois S Butler
(15 Aug 1908 Oklahoma, USA - 21 Oct 2004 San Diego, San Diego County, California, USA)
         ├─Verna Barker
(28 Mar 1913 Oklahoma, USA - 3 Apr 1985 bur.Sunset Memorial Gardens, Odessa, Ector County, Texas, USA)
         │ + Harley Jeffro Romine
(18 Nov 1907 Oklahoma, USA - 14 Oct 1981 Odessa, Ector County, Texas, USA)
         ├─Bob Barker
(Abt 1915 Oklahoma, USA - ??)
         ├─Bud Arnold Barker
(31 Jan 1918 Apache, Caddo County, Oklahoma, USA - 12 Jul 1992 Cassville, Barry County, Missouri, USA)
         │ + Jennie Loretta Marby
(27 Nov 1919 Pana, Christian County, Illinois, USA - 18 Jun 2016 Cassville, Barry County, Missouri, USA)
         ├─Cora Lee Barker
(8 Jun 1898 Chickasaw Nation, Indian Territory, USA - Jun 1981 Stillwater, Payne County, Oklahoma, USA)
         │ + John William Sumpter
(23 May 1895 Montague County, Texas, USA - Mar 1983 Ralls, Crosby County, Texas, USA)
         ├─Abbie P Barker
(12 Feb 1900 Chickasaw Nation, Indian Territory, USA - Aug 1968 Lawton, Comanche County, Oklahoma, USA)
         ├─Ova Bell Barker
(1901 Comanche County, Oklahoma, USA -          │ 1991 bur.Sunset Memorial Gardens and Mausoleum, Stillwater, Payne County, Oklahoma, USA)
         └─Claude Nicque Barker
(5 Mar 1909 Comanche County, Oklahoma, USA - 10 Sep 1983 Kern County, California, USA)