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: Thomas Walter FARMER
(22 Apr 1869 Beverley, Western Australia, Australia - 20 Nov 1951)
Mother: Henrietta FLEAY
(2 Dec 1874 Beverley, Western Australia, Australia - 4 Oct 1926)
Deage Norris FARMER
(14 Feb 1909 Williams, Western Australia, Australia - 3 Oct 1995)
Rachael Matilda Olive DAY
(29 Dec 1902 Williams Bridge, Western Australia, Australia - 13 Sep 1997 Westburn, Victoria, Australia)
1909 - 1995 (86 years)
Rachael Matilda Olive DAY 
(29 Dec 1902 Williams Bridge, Western Australia, Australia - 13 Sep 1997 Westburn, Victoria, Australia)