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":
Catharine ???
(Feb 1856 Ohio - 19 Jun 1907 Cincinnati, Hamilton County, Ohio)
Casper A Meyer (Feb 1843 Germany - 7 Dec 1907 Covington, Kenton County, Kentucky)
   ├─Anna M. Meyer (12 May 1874 Cincinnati, Hamilton County, Ohio - 20 Jun 1950 Kenton County, Kentucky)
   │ + Harry Raders (Jun 1874 Kentucky - Yes, date unknown)(m. 1899)
   │ Henry Raters (1872 Ohio - Yes, date unknown)
   ├─Lizzie Meyer (Mar 1876 Ohio - Yes, date unknown)
   ├─Catharine Meyer (Feb 1881 Ohio - Yes, date unknown)
   ├─Rosa Meyer (24 Nov 1888 Cincinnati, Hamilton County, Ohio - ??)
   ├─William H. Meyer (12 Jun 1890 Cincinnati, Hamilton County, Ohio -    │ 10 Jul 1960 Cedar Grove, Franklin County, Indiana)
   │ Kunigunda Johanna Wilhelm (24 Feb 1894 Saint Leon, Dearborn County, Indiana -    │ 28 Feb 1982 Cedar Grove, Franklin County, Indiana)(m. 21 Apr 1914 Franklin, Indiana)
   │    ├─William J Meyer (Abt 1919 Kentucky - 7 Dec 1997 Madison, Jefferson County, Indiana)
   │    └─Mary Louise Meyer (14 Nov 1915 Covington, Kenton County, Kentucky -    │     10 Aug 1966 Cedar Grove, Franklin County, Indiana)
   ├─Charles Meyer (Jul 1891 Ohio - Yes, date unknown)
   └─Louis Leo Meyer (Covington, Kenton County, Kentucky;15 Jun 1894 - 14 Dec 1960)
       ├─James Robert Meyer (9 Mar 1926 Covington, Kenton County, Kentucky -        │ 16 Oct 2004 Cincinnati, Hamilton County, Ohio)