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: Caleb George LAMB
(5 Jul 1879 Almont, Ontario, Canada - 19 Nov 1959 Philadelphia, Philadelphia, Pennsylvania, USA)
Mother: Winnifred GILLESPIE
(4 Aug 1880 Bradford, Yorkshire, England - 7 Aug 1924 Philadelphia, Pennsylvania, USA)
Joseph George LAMB
(28 Jan 1909 Philadelphia, Pennsylvania, USA - 19 Jun 1987 Warminster, Bucks, Pennsylvania, USA)
Marion Emma BOOTH
(3 Sep 1913 Philadelphia, Pennsylvania, USA - 13 Jul 1993 Warminster, Bucks, Pennsylvania, USA)
         │ George Jacob WAGENMANN
(17 Sep 1933 Philadelphia, Philadelphia, Pennsylvania, USA - 27 Jun 2014 Warminster, Bucks, Pennsylvania, USA)