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":
Sher ALI
(Between 1882 and 1884 India - 11 Jan 1950 Perth, Western Australia, Australia)
Barbara Ellen GALBRAITH (Abt 1905 Yalgoo, Western Australia, Australia - 5 Nov 1978 Maniana, Western Australia, Australia)(m. 1927 Murchison, Western Australia, Australia)
└─Zara Zaryba SHER-ALI (19 Feb 1931 Gosnells, Western Australia, Australia - 4 Jun 2016 Gwelup, Western Australia, Australia)
Erin Walter KEARNEY (Perth, Western Australia, Australia;26 Dec 1929 - 2 Jun 1980)
(m. 1952 Canning, Western Australia, Australia)
1884 - 1950 (~ 68 years)
Barbara Ellen GALBRAITH 
(Abt 1905 Yalgoo, Western Australia, Australia -