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":
Father: Albert MATHEWS (25 Jun 1877 Cornwall, England - 1 May 1944 Boulder, Western Australia, Australia)
Mother: Jane BALDOCK (1879 Eaglehawk, Victoria, Australia - 10 Feb 1952 Boulder, Western Australia, Australia)
Olive MATTHEWS
(24 Jul 1906 Brown Hill, Western Australia, Australia - 22 Dec 1974 Perth, Western Australia, Australia)
Arthur Laurence GRAFTON (13 Dec 1905 Menzies, Western Australia, Australia - 9 Jun 1977 Perth, Western Australia, Australia)(m. 5 Mar 1930 Boulder, Western Australia, Australia)
   ├─Linda Lurline GRAFTON (Northam, Western Australia, Australia;8 Mar 1932 - 1932)
   └─Leslie Laurence GRAFTON (23 Aug 1933 Northam, Western Australia, Australia -     9 Jul 2017 Perth, Western Australia, Australia)