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":
George Henry PALMATEER
(7 Aug 1866 Sandhurst, Victoria, Australia - 10 Sep 1951 Bickley, Western Australia, Australia)
Lucy Ann Jane WALLIS (13 Apr 1877 Fremantle, Western Australia, Australia - 5 Aug 1958 Bickley, Western Australia, Australia)
└─Dulcie Olwyn PALMATEER (26 Nov 1914 Bickley, Western Australia, Australia - 30 Dec 1998 Paddington, New South Wales, Australia)
Clement Greaves WATSON (2 Mar 1915 Cooranbong, New South Wales, Australia - 30 Jul 1992 Bickley, Western Australia, Australia)
1866 - 1951 (85 years)
Lucy Ann Jane WALLIS 
(13 Apr 1877 Fremantle, Western Australia, Australia -