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: John LUFF
(Between 1810 and 1812 Canterbury, Kent, England - 22 Mar 1860 Fremantle, Western Australia, Australia)
Mother: Mary Ann BAKER
(Between 1814 and 1820 Maidstone, Kent, England - 10 Jun 1860 Fremantle, Western Australia, Australia)
John LUFF
(1848 St. Ives, Huntingdonshire, England - 1904 Perth, Western Australia, Australia)
Margaret GREEN
(Fremantle, Western Australia, Australia;1868 - 1935)
         └─John Stannon LUFF
(1886 Fremantle, Western Australia, Australia - 7 Jun 1917 Belgium)
          + Ruby May MCLAUGHLIN
(19 May 1895 Fremantle, Western Australia, Australia - 26 May 1968 South Fremantle, Western Australia, Australia)