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":
Patrick Ildephonsus JETTA
(5 Feb 1900 New Norcia, Western Australia, Australia - 13 Jan 1965 Fremantle, Western Australia, Australia)
Joanne Christine MICHAEL (1902 Northam, Western Australia, Australia - 24 Jul 1986 Kellerberrin, Western Australia, Australia)
└─Vincent JETTA (1 Jul 1926 Kellerberrin, Western Australia, Australia - 9 Sep 1998 Bruce Rock, Western Australia, Australia)
Irene HUMPHRIES (11 Dec 1930 Kellerberrin, Western Australia, Australia - 15 Apr 2014 Bruce Rock, Western Australia, Australia)(m. 1947 Northam, Western Australia, Australia)
└─Trevor JETTA (4 Jun 1951 - 11 Mar 2021 Merredin, Western Australia, Australia)
1900 - 1965 (64 years)
Joanne Christine MICHAEL 
(1902 Northam, Western Australia, Australia -