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":
William Walter HANKIN
(15 Jul 1867 - Between 1925 and 1928 Caulfield, Victoria, Australia)
Ellen Jane LUCAS (31 Aug 1869 Collingwood, Victoria, Australia - 11 Jul 1936 Cheltenham, Victoria, Australia)
(m. 1888 Victoria, Australia)
   └─Ivy Myrtle HANKIN (14 Jan 1897 Hotham, Victoria, Australia - 22 Aug 1981 Canterbury, Victoria, Australia)
    Frederick Richard Thomas Nethington LOWE (27 Jul 1894 Ulverstone, Tasmania, Australia -     6 May 1962 Melbourne, Victoria, Australia)(m. 1920 Victoria, Australia)
       └─Elaine Ivy LOWE (25 Oct 1920 Hobart, Tasmania, Australia - 2010)
        Frederick Cyril LEECH (Jan 1910 West Ham, Essex, England - DECEASED Victoria, Australia)
        (m. 13 Jul 1940 Gardenvale, Victoria, Australia)