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":
Thomas Lynton MCKIMM
(27 Nov 1910 Parkes, New South Wales, Australia - 6 Apr 1980 Sydney, New South Wales, Australia)
Beryl Jean DICKINSON
(26 Feb 1912 Petersham, New South Wales, Australia - 11 Jun 2005 Gordon, New South Wales, Australia)
└─Graeme James MCKIMM
(Vaucluse, New South Wales, Australia;31 Jul 1937 - 2023)
Lois DAWSON
(St Ives, New South Wales, Australia;5 Sep 1933 - 13 Apr 2023)
1910 - 1980 (69 years)
Beryl Jean DICKINSON 
(26 Feb 1912 Petersham, New South Wales, Australia - 11 Jun 2005 Gordon, New South Wales, Australia)