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":
Elizabeth Hulda NADEBAUM
(Abt 1875 South Australia, Australia - 26 May 1962 Donnybrook, Western Australia, Australia)
Charles Dawson BROCKMAN (12 Sep 1872 Greenough, Western Australia, Australia - 26 Mar 1907 Denham, Western Australia, Australia)(m. 6 Sep 1904 Bunbury, Western Australia, Australia)
└─Reginald Dawson DRAKE-BROCKMAN (19 Jul 1905 Kookynie, Western Australia, Australia - 4 Feb 1989 Claremont, Western Australia, Australia)
Minna Kate Bremer MITCHELL (19 Oct 1909 Donnybrook, Western Australia, Australia - 16 Jan 2002 Claremont, Western Australia, Australia)(m. 30 Jun 1938 Perth, Western Australia, Australia)
Abt 1875 - 1962 (~ 87 years)
Charles Dawson BROCKMAN 
(12 Sep 1872 Greenough, Western Australia, Australia -