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":
Mother: Sidney Ann Horton (2 Aug 1858 Tishomingo County, Mississippi, USA - 28 May 1942 Fort Sumner, De Baca County, New Mexico, USA)
Edward Lucille (Ed) Cooper
(8 Jan 1887 Erath County, Texas, USA - 30 Jun 1974 Yuba City, Sutter County, California, USA)
Thomas Claude Baker, Sr
(6 Jul 1882 Stephenville, Erath County, Texas, USA - 25 May 1962 Fresno, Fresno County, California, USA)
         ├─Bertha Elberta Baker
(21 Jul 1908 Dodson, Quay County, New Mexico, USA - 18 May 1998 Vernon, Wilbarger County, Texas, USA)
         │ Lewis Walker
(Abt 1907 New Mexico, USA - ??)
         ├─Cleo Willie Baker
(3 Jan 1910 Acme, Hardeman County, Texas, USA - 13 Jun 1976 Sacramento County, California, USA)
         │ + Nathan Henry Dozier
(20 Apr 1906 San Angelo, Tom Green County, Texas, USA - 16 Apr 1980 Yuba City, Sutter County, California, USA)
         ├─Cecil Edward Baker
(17 Dec 1912 Eldorado, Jackson County, Oklahoma, USA - 7 Nov 2006 Fresno, Fresno County, California, USA)
         │ + Lena May ??
(1918 New Mexico, USA - 29 May 1967 Fresno, Fresno County, California, USA)
         ├─Clifford David Baker
(2 Jul 1915 Eldorado, Jackson County, Oklahoma, USA - 15 Aug 2007 Deming, Luna County, New Mexico, USA)
         ├─Jewell Marie Baker
(22 Jul 1922 Alex, Grady County, Oklahoma, USA - 26 Sep 1997 Lubbock, Lubbock County, Texas, USA)
         │ + Marvin E Ellis
(19 Aug 1913 - 1 Mar 2001 Lubbock, Lubbock County, Texas, USA)
         │ James Garland Wheeler
(26 Jan 1920 Denton, Denton County, Texas, USA -          │ 21 Aug 1980 Wichita Falls, Wichita County, Texas, USA)
         │          └─James Lewis Wheeler
(27 Feb 1942 Jackson County, Oklahoma, USA - 28 Jun 1966)
         ├─Lee Roy Baker
(3 Mar 1918 Alex, Grady County, Oklahoma, USA - 31 Mar 2006 Hondo, Medina County, Texas, USA)
         │ + Ethel Mae Schule
(Hondo, Medina County, Texas, USA;1 Jun 1921 - 2 Nov 2005)
         ├─Ira Sidney (Bud) Baker
(21 Feb 1926 Wilbarger County, Texas, USA - 5 Feb 2007 Boise, Ada County, Idaho, USA)
         ├─Thomas Claude (T.C.) Baker, Jr
(13 Apr 1928 Wellington, Collingsworth County, Texas, USA -          │ 11 Nov 2020 Fresno, Fresno County, California, United States of America)
         └─Thomas Eugene Baker
(Alex, Grady County, Oklahoma, USA;26 Nov 1925 - 29 Nov 1925)