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":
Legend:
Josef Sieren
(15 Nov 1774 Maimiile, Germany - 13 Apr 1813 Perl, Germany)
Margareta Gengler (26 May 1775 Oberperl, Germany - 9 Jan 1842 Perl, Germany)
   └─Josef Sieren (Perl, Saarland, Germany;5 Aug 1807 - 16 Nov 1862)
    Catherine Schilz (15 Feb France - 1863 Perl, Saarland, Germany)
       └─Joseph Sieren (7 Jun 1857 Perl, Saarland, Germany -         2 Jul 1928 Clear Creek Township, Keokuk County, Iowa)
        Anna Heisel (Keokuk County, Iowa;Jun 1860 - 10 Jul 1900)(m. 1878 Germany)
        :   ├─Rosa E Sieren
        :   └─Margaret Sieren (1 Aug 1881 Keokuk County, Iowa - 30 Nov 1980 Keota, Keokuk County, Iowa) =>
        :    + John Jacob Merz (3 Jan 1875 Keokuk County, Iowa - 27 Feb 1933 Harper, Keokuk County Iowa)
        :    (m. 23 Oct 1902 Ss. Peter & Paul Catholic Church, Clear Creek Township, Keokuk, County, Iowa)