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":
Thade Edward SULLIVAN
(14 Aug 1872 Tralee, Kerry, Ireland - 29 Oct 1939 Bunbury, Western Australia, Australia)
Florence Maude USHER (23 Nov 1870 Attercliffe, Yorkshire, England - 17 Jul 1963 Narrogin, Western Australia, Australia)(m. 29 Aug 1896 Fremantle, Western Australia, Australia)
└─James Grimley SULLIVAN (1908 Bunbury, Western Australia, Australia - 15 May 1979 Perth, Western Australia, Australia)
Alice Victoria GILCHRIST (24 Apr 1909 Bridgetown, Western Australia, Australia - 14 Jun 1991 Perth, Western Australia, Australia)(m. 18 Apr 1933 Bunbury, Western Australia, Australia)
└─Alan Patrick SULLIVAN (3 Feb 1942 - 2 Jan 2014 Waikiki, Western Australia, Australia)
1872 - 1939 (67 years)
Florence Maude USHER 
(23 Nov 1870 Attercliffe, Yorkshire, England -