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":
John Lewis
(1 Jan 1809 - 20 May 1896 Elmville, Highland County, Ohio, USA)
Sarah Setty
(Highland County, Ohio, USA;3 Mar 1804 - 13 Mar 1878)
         └─Elizabeth Ellen Lewis
(Highland County, Ohio, USA;11 Nov 1847 - 29 Nov 1918)
          Jacob Setty
(Highland County, Ohio, USA;20 Dec 1856 - 23 Feb 1922)
          :         ├─John William Setty
(1877 Elmville, Highland County, Ohio, USA - 21 Jan 1960 Hillsboro, Highland County, Ohio, USA)
          :         ├─Sarah I Setty
(Abt 1867 Highland County, Ohio, USA - ??)
          :         └─Mary M. A. Setty
(Abt 1870 Highland County, Ohio, USA - ??)
          + James R Gall
(29 Jan 1836 - 30 Mar 1872 bur.Elmville, Highland County, Ohio, USA)