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":
Callie Gryder
(16 Mar 1881 Whitfield County, Georgia, USA - 21 Jul 1940 Varnell Estates, Bradley County, Tennessee, USA)
         ├─Thomas Jefferson Richmond
(10 Jun 1905 Cleveland, Bradley County, Tennessee, USA - 14 Jun 1965 Circleville, Pickaway County, Ohio, USA)
         │ Kathyron Jessica Dulin
(23 Jul 1908 Tennessee, USA - 11 Jun 1982 Cleveland, Bradley County, Tennessee, USA)
         │                    │ + Susan Tinsley
(Abt 1963 - 14 Mar 2016 Cleveland, Bradley County, Tennessee, USA)
         │           + Living
         ├─John 'Willard' Richmond
(17 Feb 1917 Cleveland, Bradley County, Tennessee, USA - 26 Feb 2010 Nashville, Davidson County, Tennessee, USA)
         │ + Living
         ├─Clara Belle Richmond
(16 Oct 1903 Cleveland, Bradley County, Tennessee, USA - 14 Feb 1997 Nashville, Davidson County, Tennessee, USA)
         ├─William 'Gordon' Richmond
(28 Sep 1914 Cleveland, Bradley County, Tennessee, USA - 22 Feb 2005 Fort Oglethorpe, Catoosa County, Georgia, USA)
         │ Laura Elizabeth Frazior
(6 Oct 1918 Chattanooga, Hamilton County, Tennessee, USA - 9 Feb 1974 Fort Oglethorpe, Catoosa County, Georgia, USA)
         │ :         ├─John William (Johnny) Richmond
(1 Feb 1935 Cleveland, Bradley County, Tennessee, USA -          │ :         │ 19 Dec 2000 Yuma, Yuma County, Arizona, USA)
         │ :         │ Living
         ├─Martha E (Mattie) Richmond
(28 Mar 1907 Cleveland, Bradley County, Tennessee, USA - 14 Nov 1936 Chattanooga, Hamilton County, Tennessee, USA)
         │ Sam Workman
(Abt 1910 Alabama, USA - ??)
         │          └─Herbert Workman
( - 1995 Chicago, Cook County, Illinois, USA)
         ├─Malinda Pearl Richmond
(Cleveland, Bradley County, Tennessee, USA;12 Jan 1910 - 30 Oct 1913)