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: Thomas Jefferson (Jeff) Horton (1 Nov 1852 Tishomingo County, Mississippi, USA - 30 Sep 1940 Los Angeles, Los Angeles County, California, USA)
Mother: Virginia Caroline (Jennie) Todd (5 Dec 1863 Dyersburg, Dyer County, Tennessee, USA - 22 Jan 1935 Quanah, Hardeman County, Texas, USA)
Brady Leslie Horton
(29 Sep 1897 Quanah, Hardeman County, Texas, USA - 8 Nov 1989 Dallas, Dallas County, Texas, USA)
Ida Marie Hazlet
(29 Sep 1898 Leon, Decatur County, Iowa, USA - 24 Jul 2000 Searcy, White County, Arkansas, USA)
         ├─Valle Beth Horton
(24 Nov 1929 Amarillo, Potter County, Texas, USA - 5 Jul 2020 Searcy, White County, Arkansas, USA)
         │ Living
         │           + Judith Frances Wolfe
(27 Sep 1953 Henderson, Rusk County, Texas, USA - 16 Jan 2013 Cleveland, Cuyahoga County, Ohio, USA)
         └─Donald Brady Horton
(20 Jun 1925 Denver, Denver County, Colorado, USA - 24 Mar 2015 Lake Forest, Orange County, California, USA)
          Marian Bess Stapp
(28 Aug 1925 Stamford, Jones County, Texas, USA - 15 Apr 2011 Irvine, Orange County, California, USA)
                   │ :          + Living
                   │ John Frederick Lamm
(25 Jul 1945 Madison, Dane County, Wisconsin, USA -                    │ 5 Oct 2020 San Clemente, Orange County, California, USA)