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":
Father: James GREEN
(1834 Tipperary, Ireland - 26 Jul 1910 Portland, New South Wales, Australia)
Mother: Bridget BOURKE
(1840 Tipperary, Ireland - 7 May 1919 Portland, New South Wales, Australia)
Honorah GREEN
(17 Aug 1867 Lithgow, New South Wales, Australia - 14 Nov 1950 Sutherland, New South Wales, Australia)
James Michael CARLON
(1861 Clare, Ireland - 30 Dec 1940 Sutherland, New South Wales, Australia)
(m. 31 Jan 1891 Nallarawang, New South Wales, Australia)
└─Ellen K CARLON
(1915 Portland, New South Wales, Australia - DECEASED)
Frederick John MCDONALD
(14 Sep 1911 Cullen Bullen, New South Wales, Australia - 26 Dec 1976 Coledale, New South Wales, Australia)(m. 1935 Portland, New South Wales, Australia)
1867 - 1950 (83 years)
James Michael CARLON 
(1861 Clare, Ireland - 30 Dec 1940 Sutherland, New South Wales, Australia)