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":
Harry MacElroy BURSILL
(17 Apr 1895 Leichhardt, New South Wales, Australia - 15 Jul 1928 Kalgoorlie, Western Australia, Australia)
Mavis Ann WHITNEY (14 Dec 1900 Norseman, Western Australia, Australia - 7 Mar 1999 Bentley, Western Australia, Australia)(m. 1920 Boulder, Western Australia, Australia)
└─Robert Timothy BURSILL (16 Jun 1926 Bunbury, Western Australia, Australia - 2 Nov 1981)
+ Frances May WHEELER (14 Mar 1927 Liverpool, New South Wales, Australia - 6 May 2010 Darlinghurst, New South Wales, Australia)(m. 1949 Liverpool, New South Wales, Australia)
1895 - 1928 (33 years)
Mavis Ann WHITNEY 
(14 Dec 1900 Norseman, Western Australia, Australia -