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: Frederick George BRADDY
(Upper Holloway, Middlesex, England;23 Feb 1862 - 14 Nov 1941)
Mother: Alice Sarah ROGERS
(16 Jan 1866 Winchester, Hampshire, England - 5 Oct 1942 Highgate, Middlesex, England)
Albert Edward BRADDY
(9 Aug 1891 Upper Holloway, Middlesex, England - 13 Jun 1955 Southgate, Middlesex, England)
Florence Harriet Maud EDDY
(26 Oct 1885 Tottenham, Middlesex, England - 13 Jul 1970 Southgate, Middlesex, England)
         ├─Ronald Frederick BRADDY
(4 May 1918 Highgate, Middlesex, England - 18 Sep 1997 Blandford, Dorset, England)
         │ + Living
         └─Cyril Edward BRADDY
(13 May 1921 London, England - 8 Feb 1928 Highgate, Middlesex, England)