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":
Emory Lurton Schoolfield
(1 Feb 1888 Bledsoe County, Tennessee, USA - 2 Dec 1958 Pikeville, Bledsoe County, Tennessee, USA)
Beulah Maude Pankey
(Pikeville, Bledsoe County, Tennessee, USA;17 Feb 1890 - 18 Dec 1980)
         ├─Francis Emory Schoolfield
(Pikeville, Bledsoe County, Tennessee, USA;29 Apr 1914 - 2 Mar 1929)
         ├─Phyllis M Schoolfield
(23 Jan 1917 Pikeville, Bledsoe County, Tennessee, USA - 6 Feb 2001 Knoxville, Knox County, Tennessee, USA)
         │ + James Franklin Campbell
(2 Jan 1916 Bledsoe County, Tennessee, USA - 27 Nov 1989 Knoxville, Knox County, Tennessee, USA)
         ├─Anna Elizabeth Schoolfield
(Pikeville, Bledsoe County, Tennessee, USA;29 Jan 1919 - 5 Jul 2006)
         │ + Albert B McReynolds
(25 Dec 1918 - 2 Mar 2005 Pikeville, Bledsoe County, Tennessee, USA)
         ├─Beulah Edith Schoolfield
(Pikeville, Bledsoe County, Tennessee, USA;17 Dec 1932 - 8 Oct 1979)
         └─James Robert Schoolfield
(15 Dec 1923 Pikeville, Bledsoe County, Tennessee, USA - 14 Jan 2018 Chattanooga, Hamilton County, Tennessee, USA)