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":
Georgia Anna Hair
(6 SEP 1870 Georgia, USA - 18 JAN 1920 Cleveland, Bradley County, Tennessee, USA)
James Anderson Wattenbarger (7 JAN 1867 Bradley County, Tennessee, USA - 11 APR 1928 Cleveland, Bradley County, Tennessee, USA)
     ┌──James Claude Wattenbarger(19 DEC 1895 Cleveland, Bradley County, Tennessee, USA -      │ 25 APR 1938 Pinellas County, Florida, USA)
     │ Lura Geneva Hambright (12 OCT 1901 Cleveland, Bradley County, Tennessee, USA -      │ 24 AUG 1992 Gainesville, Alachua County, Florida, USA)
     │      ┌──James Lorenzo Wattenbarger(2 MAY 1922 Cleveland, Bradley County,      │      │ Tennessee, USA - 14 AUG 2006 Gainesville, Alachua County, Florida, USA)
     │      │ + M.S. ??
     ┌──Carl Valencourt Wattenbarger(11 FEB 1898 Cleveland, Bradley County, Tennessee,      │ USA - 21 DEC 1991 Cleveland, Bradley County, Tennessee, USA)
     │ Jessie Trewhitt (7 DEC 1902 Cleveland, Bradley County, Tennessee, USA -      │ : 19 OCT 1965 Cleveland, Bradley County, Tennessee, USA)
     │ :     └──Margaret Evelyne Wattenbarger(10 MAR 1925 Cleveland, Bradley County,      │ :      Tennessee, USA -      │ :      29 OCT 1978 Bunn, Franklin County, North Carolina, USA)
     │ + Evelyn Lois Wallace (McCoy) (6 OCT 1917 Knoxville,      │ Knox County, Tennessee, USA - 1 OCT 1999)
     ┌──Ernest Cady Wattenbarger(6 NOV 1899 Bradley County, Tennessee, USA -      │ 21 OCT 1959 Bradley County, Tennessee, USA)
     │ Gertrude Estella Kile (28 APR 1900 Bradley County, Tennessee, USA -      │ 21 NOV 1995 Huntsville, Madison County, Alabama, USA)
     │      ┌──Christina Wattenbarger(ABT 1924 Cleveland, Bradley County, Tennessee,      │      │ USA -)
     │      ┌──Milburn Kile Wattenbarger(1925 Cleveland, Bradley County, Tennessee, USA -      │      │ 29 JUL 1944 Brooks County, Georgia, USA)
     ┌──Mary Addie Wattenbarger(17 JAN 1903 Bradley County, Tennessee, USA -      │ 3 JUN 1982 Cleveland, Bradley County, Tennessee, USA)
     │ + Floyd S Clevenger (24 DEC 1902 Lapel, Madison County, Indiana, USA -      │ 23 OCT 1936 Athens, McMinn County, Tennessee, USA)
     ┌──Bertha Allene Wattenbarger(13 DEC 1904 Bradley County, Tennessee, USA -      │ 14 SEP 1993 Cleveland, Bradley County, Tennessee, USA)
     │ + Albert Raymond Goins (1 DEC 1902 Bradley County, Tennessee, USA -      │ 12 SEP 1972 Cleveland, Bradley County, Tennessee, USA)
     └──Daniel Hair Wattenbarger(15 AUG 1910 Bradley County, Tennessee, USA -       6 JAN 1990 Cleveland, Bradley County, Tennessee, USA)
      Grace ?? (ABT 1912 Tennessee, USA -)