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":
Mary Ann LAYZELL
(13 Feb 1843 Rochford, Essex, England - 17 Dec 1885 Essex, England)
William BEWERS (2 Mar 1835 Woodham Ferrers, Essex, England - 23 Jun 1912 Wickford, Essex, England)
(m. 1861 Rochford, Essex, England)
└─Daisy Ethel BEWERS (1 Apr 1883 Hockley, Essex, England - 23 Nov 1936 Billericay, Essex, England)
Halbert John CARTER (Wickford, Essex, England;18 Dec 1875 - 9 Jul 1932)
(m. 2 Apr 1904 Billericay, Essex, England)
└─Pearl CARTER (Wickford, Essex, England;1 Feb 1914 - 12 Aug 2003)
Allan Fredrick NASON (5 Jan 1908 Manor Park, Essex, England - 28 Aug 1982 Witham, Essex, England)
(m. East Ham, Essex, England)
1843 - 1885 (42 years)
William BEWERS 
(2 Mar 1835 Woodham Ferrers, Essex, England - 23 Jun 1912 Wickford, Essex, England)
