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: Mark DUNNING
(Abt 1895 - 20 Jul 1977 Midland, Western Australia, Australia)
Mother: Ruby May ANDERSON
(1904 - 22 Oct 1966 Nedlands, Western Australia, Australia)
Mark Peter DUNNING
(20 Aug 1925 Narrogin, Western Australia, Australia - 9 Sep 1995 Bunbury, Western Australia, Australia)
Petra Alice JENSEN
(18 Jan 1927 Wickepin, Western Australia, Australia - 14 Mar 1979 Perth, Western Australia, Australia)
1925 - 1995 (70 years)
Petra Alice JENSEN 
(18 Jan 1927 Wickepin, Western Australia, Australia - 14 Mar 1979 Perth, Western Australia, Australia)