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: Jonathon James JONES (17 Feb 1811 Llandefeilog, Carmarthenshire, Wales - 6 Feb 1896 Guildford, Western Australia, Australia)
Mother: Sarah Ann SUTTON (17 May 1843 Woolwich, Kent, England - 20 May 1897 Beverley, Western Australia, Australia)
Alfred James JONES
(19 Oct 1874 Beverley, Western Australia, Australia - 2 Dec 1945 Perth, Western Australia, Australia)
Alice Maud Mary WILLEY (22 Aug 1886 Beverley, Western Australia, Australia - 21 May 1964 North Fremantle, Western Australia, Australia)(m. 11 Feb 1903 Southern Cross, Western Australia, Australia)
   └─Roy Harold JONES (6 Feb 1923 East Fremantle, Western Australia, Australia -     6 May 1971 Perth, Western Australia, Australia)