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: Kevin Joseph ANDERSON
(Geraldton, Western Australia, Australia;1923 - 13 Aug 1968)
Mother: Gloria Ruth BURGESS
(Geraldton, Western Australia, Australia;4 Apr 1926 - 6 Nov 1999)
Garry ANDERSON
(20 Feb 1948 Geraldton, Western Australia, Australia - 20 Nov 2018 Port Macquarie, New South Wales, Australia)
Sandra Kay BRANDIS
(26 Feb 1952 Subiaco, Western Australia, Australia - 3 Nov 1989 Paraburdoo, Western Australia, Australia)(m. 20 Jan 1970)
├─Troy Anthony ANDERSON
(14 Jan 1971 Pinjarra, Western Australia, Australia - │ 24 Jul 2020 Perth, Western Australia, Australia)
1948 - 2018 (70 years)
Sandra Kay BRANDIS 
(26 Feb 1952 Subiaco, Western Australia, Australia -