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":
   └─Jacques Sondag (28 Feb 1775 Apach, Moselle, Lorraine, France -     27 Dec 1846 Kerling-lès-Sierck, Moselle, Lorraine, France)
    Anna Maria Theobald (23 Dec 1816 Schengen, Remerschen, Remich, Grevenmacher, Luxembourg - 31 Dec 1897 Clear     : Creek, Keokuk County, Iowa)(m. 17 Sep 1843 Kerling-lès-Sierck, Moselle, Lorraine, France)
    :   ├─Jacques Frank Sondag (31 Oct 1843 Alsace-Lorraine Province, France -     :   │ 18 Mar 1897 Harper, Keokuk County, Iowa)
    :   │ Barbara Berg (4 Jul 1852 Clear Creek Township, Keokuk County, Iowa - 8 Nov 1930 Keokuk County, Iowa)
    :   │ (m. 1869 Baden, Iowa)
    :   │    ├─Michael Sondag (25 Jun 1870 - 22 Mar 1960)
    :   │    ├─Nicholas Sondag (23 Dec 1871 Clear Creek Township, near Baden, Keokuk County, Iowa -     :   │    │ 16 Jun 1960 Harper, Keokuk County, Iowa) =>
    :   │    │ + Magdalena Peiffer (2 Apr 1877 Clear Creek Township, Keokuk County, Iowa -     :   │    │ 10 Mar 1949 Harper, Keokuk County, Iowa)(m. 15 Feb 1898)
    :   │    ├─Jacob Theodore Sondag (8 Jul 1873 Keokuk County, Iowa - 4 Dec 1908 Keota, Keokuk County, Iowa) =>
    :   │    │ + Regina Anna Peiffer (19 Jun 1878 At Home on Farm, Clear Creek Township, Keokuk County, Iowa - 13     :   │    │ Feb 1974 At Home, Harper, Keokuk County, Iowa)(m. 15 May 1900 Ss. Peter & Paul Catholic Church,     :   │    │ Clear Creek Township, Keokuk, County, Iowa)
    :   │    ├─Katie Sondag (22 Apr 1875 - Nov 1878)
    :   │    ├─Frank Sondag (16 Jan 1879 - 3 Jun 1957) =>
    :   │    │ + Elizabeth Klett
    :   │    ├─John Henry Sondag (17 Jan 1881 - 19 Mar 1970)
    :   │    ├─Matthias Sondag (6 Aug 1883 - 11 Dec 1971)
    :   │    ├─Theresa Barbara Sondag (6 Jun 1885 Harper, Keokuk County, Iowa - 16 Aug 1969)
    :   │    ├─Mary Sondag (10 Mar 1888 - 20 Nov 1960)
    :   │    ├─Clara Ann Sondag (10 Oct 1889 - 23 Aug 1987)