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: James LINDSAY
(Warrnambool, Victoria, Australia;1 Mar 1863 - 17 Sep 1939)
Mother: Eliza BOND
(25 Jan 1869 Heywood, Victoria, Australia - 25 May 1961 Greenvale, Victoria, Australia)
Horace John LINDSAY
(1 May 1890 Heywood, Victoria, Australia - 17 Jul 1980 Traralgon, Victoria, Australia)
Lilian MATHERS
(13 Mar 1898 Heywood, Victoria, Australia - 4 Jan 1974 Moe, Victoria, Australia)
         └─Margaret Esther LINDSAY
(18 Dec 1924 Warrnambool, Victoria, Australia - 4 Aug 2010 Tweed Heads, New South Wales, Australia)
          + James IRVING
(18 Sep 1920 Glasgow, Lanarkshire, Scotland - 5 Aug 2014 Banora Point, New South Wales, Australia)