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":
James M Ross
(18 Jul 1833 Tennessee, USA - 11 Oct 1916 Trenton, Dade County, Georgia, USA)
Frances A Gordon
(22 Jul 1839 Jackson County, Alabama, USA - 17 Jul 1926 Alabama, USA)
         ├─Anderson Gordon Ross
(31 Jan 1858 Jackson County, Alabama, USA - 2 Sep 1940 Birmingham, Jefferson County, Alabama, USA)
         │ Susie F Harrison
(Abt 1883 Alabama, USA - ??)
         │          └─Myrtle Ross
(15 Jan 1905 Jefferson County, Alabama, USA - Apr 1974)
         ├─John Allison Ross
(1 Sep 1860 Georgia, USA - 26 Jul 1927 Shamrock, Wheeler County, Texas, USA)
         ├─Joseph J Ross
(10 Nov 1865 Alabama, USA - 6 Nov 1946 Georgia, USA)
         │ Blanch Magnolia Owens
(21 Jul 1872 Alabama, USA - 23 Jul 1960 Catoosa County, Georgia, USA)
         │          ├─Karl Hayes Ross
(8 Jan 1891 Jackson County, Alabama, USA - 4 Jul 1919)
         │          ├─Clyde O Ross
(8 Jan 1901 - 21 Jan 1973)
         │          ├─James G Ross
(29 Jul 1908 - ??)
         │          ├─Claude F Ross
(23 Dec 1893 - 5 May 1895)
         │          ├─Ora Mae Ross
(29 Mar 1892 Alabama, USA - 7 Aug 1971 Georgia, USA)
         │          ├─Gladys E Ross
(5 Apr 1904 Alabama, USA - 13 Mar 1998 Georgia, USA)
         │          ├─Thomas Roy Ross
(21 Apr 1896 Jackson County, Alabama, USA - 20 May 1972)
         │          └─Eva A Ross
(24 Dec 1898 - 13 Jan 1976)
         ├─James Ross
(Abt 1866 Jackson County, Alabama, USA - ??)
         ├─Nancy Ross
(Abt 1870 Jackson County, Alabama, USA - ??)
         └─Clara P Ross
(26 May 1868 Jackson County, Alabama, USA - 21 Dec 1952 Trenton, Dade County, Georgia, USA)