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: Edward Jones GOULD
(Geraldton, Western Australia, Australia;24 Mar 1873 - 14 Jul 1951)
Mother: Mary Jane CONNOLLY
(5 Sep 1874 Western Australia, Australia - DECEASED)
Norma GOULD
(1904 Geraldton, Western Australia, Australia - 27 Jan 1987)
Ernest Harold JUPP
(1 Sep 1900 Nabawa, Western Australia, Australia - 4 Mar 1983 Geraldton, Western Australia, Australia)
└─Merle JUPP
(5 Feb 1926 Geraldton, Western Australia, Australia - 16 Sep 1997)
Claude TETLOW
(Geraldton, Western Australia, Australia;28 May 1921 - 12 May 2001)
1904 - 1987 (83 years)
Ernest Harold JUPP 
(1 Sep 1900 Nabawa, Western Australia, Australia - 4 Mar 1983 Geraldton, Western Australia, Australia)