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":
William Campbell Richmond
(1837 Cleveland, Bradley County, Tennessee, USA - 4 Sep 1864 Nashville, Davidson County, Tennessee, USA)
         ├─Mary Tennessee Richmond
(May 1861 Bradley County, Tennessee, USA - ??)
         │ + James Henry Higgins
(24 Jun 1859 Bradley County, Tennessee, USA - 7 Jun 1924 Hamilton County, Tennessee, USA)
         ├─Isaac W Richmond
(1859 Bradley County, Tennessee, USA - 1865 Tennessee, USA)
         └─William Campbell Richmond, Jr
(12 Feb 1865 Bradley County, Tennessee, USA - 3 Nov 1935 Varnell, Whitfield County, Georgia, USA)
          Rosalie Elizabeth Airheart
(26 Aug 1870 Bradley County, Tennessee, USA - 31 Dec 1940 Varnell, Whitfield County, Georgia, USA)
                   ├─Oscar D Richmond
(27 Aug 1889 Bradley County, Tennessee, USA - 28 Aug 1944 Cleveland, Bradley County, Tennessee, USA)
                   ├─William Lee Richmond
(24 Sep 1892 Red Clay, Whitfield County, Georgia, USA - 28 Jul 1963 bur.Bradley County, Tennessee, USA)