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":
Ethel Constance BROUN
(28 Jul 1869 Beverley, Western Australia, Australia - 1 Dec 1958 Perth, Western Australia, Australia)
Walter James Charles Arnold LIGHT (24 Jun 1861 Adelaide, South Australia, Australia - 19 Oct 1926 Perth, Western Australia, Australia)(m. 17 Sep 1890 Beverley, Western Australia, Australia)
└─Olivia Blanche LIGHT (1 Jan 1893 Lion Mill, Western Australia, Australia - 22 Sep 1975 Perth, Western Australia, Australia)
Edward Ervin MOYLE (3 May 1898 Ishpeming, Marquette, Michigan, USA - 3 Oct 1983 Bunbury, Western Australia, Australia)(m. 7 Oct 1922 West Perth, Western Australia, Australia)
└─James Walter Ervin MOYLE (19 Apr 1927 Perth, Western Australia, Australia - 2 Jul 2006 Joondalup, Western Australia, Australia)
1869 - 1958 (89 years)
Walter James Charles Arnold LIGHT 
(24 Jun 1861 Adelaide, South Australia, Australia -