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":
John Robert Keene
(Abt 1856 Horses Cave, Hart County, Kentucky, USA - Jan 1892 Fannin County, Texas, USA)
Mary Emma Todd
(11 Feb 1861 Dyersburg, Dyer County, Tennessee, USA - 14 Jan 1958 Quanah, Hardeman County, Texas, USA)
         ├─Cora B Keene
(20 Sep 1879 Texas, USA - 14 Sep 1965 Redlands, San Bernardino County, California, USA)
         │ + John Claude Kinder
(19 Jun 1876 Texas, USA - 22 Jan 1948 San Bernardino, San Bernardino County, California, USA)
         ├─Mary Blanche Keene
(14 Mar 1883 Texas, USA - 24 Mar 1964 Fort Worth, Tarrant County, Texas, USA)
         │ + William Marion Hurst
(9 Feb 1879 Burleson, Johnson County, Texas, USA - 22 Feb 1973 Tarrant County, Texas, USA)
         ├─Effie Lee Keene
(31 Mar 1885 Collin County, Texas, USA - 25 Mar 1966 bur.Eldorado, Jackson County, Oklahoma, USA)
         │ + William Obadiah Kelly
(3 Aug 1878 Crawford County, Missouri, USA - 9 Mar 1966 Eldorado, Jackson County, Oklahoma, USA)
         ├─Virginia May Keene
(28 Jan 1890 Savoy, Fannin County, Texas, USA - 17 Mar 1973 Lubbock, Lubbock County, Texas, USA)
         │ + Tom Hughes
(Abt 1887 Tennessee, USA - ??)
         └─James William Keene
(7 Dec 1890 Savoy, Fannin County, Texas, USA - 8 Jun 1972 Quanah, Hardeman County, Texas, USA)
          Rebecca Viola Elder
(1 Aug 1898 Loneoak County, Arkansas, USA - 7 Mar 1995 Quanah, Hardeman County, Texas, USA)
                   ├─Estal 'Jack' Keene
(24 Apr 1917 Quanah, Hardeman County, Texas, USA - 28 Aug 1993 San Bernardino County, California, USA)