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":
Alice LEWIS
(Abt 1863 Leominster, Herefordshire, England - Jan 1929 Birmingham, Warwickshire, England)
Frederick William LAWRENCE (1856 Frampton On Severn, Gloucestershire, England - Jun 1927 Birmingham, Warwickshire, England)(m. 18 Jul 1893 Nechells, Warwickshire, England)
└─Samuel Henry LAWRENCE (7 Sep 1889 Nechells, Warwickshire, England - Sep 1945 Birmingham, Warwickshire, England)
Rose TYE (25 Nov 1894 Nechells, Warwickshire, England - Dec 1963 Birmingham, Warwickshire, England)
George Stenhouse RONALD (6 Dec 1928 Glasgow, Lanarkshire, Scotland - 5 Dec 1994 Birmingham, Warwickshire, England)(m. 24 Mar 1951 Birmingham, Warwickshire, England)
Abt 1863 - 1929 (~ 66 years)
Frederick William LAWRENCE 
(1856 Frampton On Severn, Gloucestershire, England -