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":
Ernest James HOLLIS
(14 Apr 1885 Pappinbarra, New South Wales, Australia - 28 Aug 1945 Wauchope, New South Wales, Australia)
Bridget Maud WELSH
(21 Oct 1885 Port Macquarie, New South Wales, Australia - 29 May 1940 Taree, New South Wales, Australia)
└─Marie Clara HOLLIS
(Port Macquarie, New South Wales, Australia;10 Aug 1913 - 10 Nov 2011)
Dominick CAELLI
(Wauchope, New South Wales, Australia;7 Feb 1900 - 3 Mar 1952)
└─Gordon Dominick CAELLI
(11 Nov 1939 - 19 Sep 2001 Port Macquarie, New South Wales, Australia)
Yvonne Adele BALDWIN
(Jandowae, Queensland, Australia;30 Oct 1940 - 15 May 2003)
1885 - 1945 (60 years)
Bridget Maud WELSH 
(21 Oct 1885 Port Macquarie, New South Wales, Australia - 29 May 1940 Taree, New South Wales, Australia)