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: Louis Laurence SMITH
(26 Aug 1867 Mount Gambier, South Australia, Australia - 14 Jun 1956 Mosman Park, Western Australia, Australia)
Mother: Elizabeth DEWAR
(26 Dec 1869 Mount Gambier, South Australia, Australia - 28 Jul 1939 Perth, Western Australia, Australia)
Ruth Elizabeth SMITH
(21 Feb 1890 Natimuk, Victoria, Australia - 17 Nov 1972 New South Wales, Australia)
Frederick Charles BURLEY
(5 Sep 1883 Bungaree, Victoria, Australia - 1977 Taree, New South Wales, Australia)
         └─Laurence Henry BURLEY
(10 Dec 1917 Maclean, New South Wales, Australia - 15 Jan 2010 Wollongong, New South Wales, Australia)
          Mary Carmel STEARMAN
(24 Nov 1921 Glencoe, New South Wales, Australia - 10 Aug 2003 Tamworth, New South Wales, Australia)