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":
Janet PALMER
(26 Jun 1879 Millicent, South Australia, Australia - DECEASED)
Charles Henry WALDEN
(19 Apr 1862 Mount Pleasant, South Australia, Australia - 10 May 1942 Mount Gambier, South Australia, Australia)
└─Una Doris Ann WALDEN
(13 Apr 1917 Millicent, South Australia, Australia - 20 Jul 1976)
Ernest Allen NEALE
(22 Jan 1913 - 25 Aug 1997 South Australia, Australia)
└─Allen Roy NEALE
(21 Oct 1936 Mount Gambier, South Australia, Australia - 22 Feb 2005 South Australia, Australia)
1879 - DECEASED
Charles Henry WALDEN 
(19 Apr 1862 Mount Pleasant, South Australia, Australia - 10 May 1942 Mount Gambier, South Australia, Australia)