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":
May EVANS
(18 Nov 1874 Adelaide, South Australia, Australia - 28 Jan 1963)
James NAIRN (11 Aug 1874 Irwin, Western Australia, Australia - 28 Sep 1950 Narrogin, Western Australia, Australia)
(m. 6 Jan 1908 Perth, Western Australia, Australia)
└─Dulcima Joyce NAIRN (26 Mar 1917 Perth, Western Australia, Australia - 2000 Wagin, Western Australia, Australia)
Robert BEYNON (31 Jul 1906 Perth, Western Australia, Australia - 6 Dec 1974 Wagin, Western Australia, Australia)(m. 1938 Williams, Western Australia, Australia)
1874 - 1963 (88 years)
James NAIRN 
(11 Aug 1874 Irwin, Western Australia, Australia - 28 Sep 1950 Narrogin, Western Australia, Australia)
