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":
Louisa STONE
(9 Jul 1837 Basford, Nottinghamshire, England - 1 Aug 1924 Ballarat, Victoria, Australia)
Robert McLean AGNEW (7 May 1831 Auchencairn, Lanarkshire, Scotland - 20 Aug 1893 Ballarat, Victoria, Australia)
└─Annie AGNEW (28 Jan 1858 Carngham, Victoria, Australia - 17 Dec 1940 Victoria, Australia)
William GRAY (28 Jan 1851 Bishopbriggs, Lanarkshire, Scotland - 5 Jul 1920 Balaclava, Victoria, Australia)
└─Annie GRAY (14 Nov 1881 Ballarat, Victoria, Australia - 7 Dec 1919 Yarram, Victoria, Australia)
Hugh James MASTERS (17 Apr 1879 Caulfield, Victoria, Australia - 25 Oct 1936 Yarram, Victoria, Australia)
└─Stanley Louis MASTERS (16 Apr 1908 Dandenong, Victoria, Australia - Feb 1973 Yarram, Victoria, Australia)
Lilian Weston SPEED (17 Apr 1908 Macks Creek, Victoria, Australia - 5 Oct 1985 Yarram, Victoria, Australia)
1837 - 1924 (87 years)
Robert McLean AGNEW 
(7 May 1831 Auchencairn, Lanarkshire, Scotland - 20 Aug 1893 Ballarat, Victoria, Australia)