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":
Eula Mae Farmer
(ABT 1905 Alvarado, Johnson County, Texas, USA - unknown)
Coke Gladys Morris (8 JUN 1902 Dallas, Dallas County, Texas, USA - 19 JUN 1966 Dallas, Dallas County, Texas, USA)
     ┌──Coke Russell Morris, Sr(28 SEP 1921 Dallas, Dallas County, Texas, USA -      │ 1 APR 1990 Randall County, Texas, USA)
     │      ┌──Coke Russell (Butch) Morris, Jr.(1 SEP 1942 Dallas, Dallas County, Texas,      │      │ USA - 10 JUN 2002 Dallas, Dallas County, Texas, USA)
     ┌──Kenneth Leslie Morris(29 AUG 1923 Dallas, Dallas County, Texas, USA -      │ 11 JAN 1999 Irving, Dallas County, Texas, USA)
     │ + Helen Loreto Martin (21 AUG 1932 Eustace, Henderson County, Texas, USA -      │ 19 AUG 1995)
     ┌──Doris Jean Morris(ABT 1925 Dallas, Dallas County, Texas, USA -)
     ┌──Glenn Edwin Morris(2 DEC 1926 Dallas, Dallas County, Texas, USA -      │ 16 NOV 1994 Dallas, Dallas County, Texas, USA)