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":
Pearson Balliet, Mrs Mary Ellen
(27 Sep 1862 Silver Creek, Schuylkill, Pennsylvania, United States of America - 10 Sep 1939 Mahanoy City, Schuylkill, Pennsylvania, United States of America)
Balliet, Mr Asby
(3 Oct 1854 Mount Carbon, Schuylkill, Pennsylvania, United States of America - 16 Nov 1931 Gilberton, Schuylkill, Pennsylvania, United States of America)
         ├─Balliet, Mr Thomas K
(12 Mar 1884 Saint Nicholas, Schuylkill, Pennsylvania, United States of America -          │ 27 Mar 1959 Reading, Berks, Pennsylvania, United States of America)
         │          ├─Balliet, T Lamar
(Abt 1912 - Abt 1981 bur.Mahanoy City, Schuylkill, Pennsylvania, United States of America)
         │          ├─Balliet Beitzel, Mrs Martha Irene
(1 Jun 1915 - 3 Mar 1995 bur.Tuckerton, Berks, Pennsylvania, United States of America)
         │          │ + Beitzel, Mr Bruce Carl
(14 Mar 1916 - 6 Aug 1976 bur.Tuckerton, Berks, Pennsylvania, United States of America)
         │          ├─Balliet, Mr William H
(20 Sep 1917 - 19 Nov 1972 bur.Laureldale, Berks, Pennsylvania, United States of America)
         │          │ Sommers Balliet, Mrs Geraldine
(28 Mar 1917 - 28 Nov 2005 bur.Laureldale, Berks, Pennsylvania, United States of America)
         │          │          └─Balliet Adam, Mrs Nancy M
(9 May 1943 Reading, Berks, Pennsylvania, United States of America -          │          │           3 Jan 2016 Phoenixville Hospital, Phoenixville, Chester, Pennsylvania, United States of America)
         │          ├─Balliet Wysocki, Mrs Christine M
(1921 - 2011)
         │          └─Balliet, Mr Robert H
(1923 - 1981)