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)
        :   └─Marie Sondag (11 Aug 1845 Kerling-lès-Sierck, Moselle, Lorraine, France - 1897)