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":
George Ellis Williams
(30 OCT 1897 South Liberty, McMinn County, Tennessee, USA - 15 FEB 1979 South Liberty, McMinn County, Tennessee, USA)
Ortha Ellen Brown (9 JAN 1911 Cleveland, Bradley County, Tennessee, USA - 11 JUN 2003 Athens, McMinn County, Tennessee, USA)
     ┌──Donald Ellis Williams(2 DEC 1929 Athens, McMinn County, Tennessee, USA -      │ 26 SEP 2002 Knoxville, Knox County, Tennessee, USA)
     │ + Doris ?? (1930 Athens, McMinn County, Tennessee, USA -      │ : 2000 Athens, McMinn County, Tennessee, USA)
     │ + Hoyle Dickson Elliott (10 SEP 1915 Englewood, McMinn County, Tennessee, USA -      │ 15 FEB 1997)
     ┌──Laura Mae Williams(16 NOV 1933 Athens, McMinn County, Tennessee, USA -      │ 8 MAY 2018 LaVergne, Rutherford County, Tennessee, USA)
     │ + George Joseph Huckabey (17 DEC 1932 Spring Creek, McMinn County, Tennessee, USA -      │ 30 JUL 2016 Athens, McMinn County, Tennessee, USA)
     └──Boyd Allen Williams(26 SEP 1938 McMinn County, Tennessee, USA -       5 JUL 2012 Athens, McMinn County, Tennessee, USA)