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":
Johanna Maria van Crezee (Sun 3 Oct 1824 Klundert (NL) - Sun 31 Jul 1887 Ooltgensplaat (NL))
(m. Fri 17 May 1850 Ooltgensplaat (NL))
   └─Geertrui Hartmans (Thu 4 Mar 1858 Ooltgensplaat (NL) - Sun 22 Nov 1925 Sommelsdijk (NL))
    Hendrik Noordijk (Thu 12 Apr 1849 Ooltgensplaat (NL) - Mon 25 May 1925 Sommelsdijk (NL))
       └─Barend Noordijk (Sun 8 Apr 1883 Herkingen (NL) - Sun 27 Jan 1952 Dirksland (NL))
        Jacomina Pieternella Kosten (Sun 26 Nov 1882 Oude Tonge (NL) - Sun 13 Jan 1963)
        (m. Thu 26 Nov 1908 Oude Tonge (NL))
           └─Leendert Noordijk (Tue 12 May 1914 Ooltgensplaat (NL) - Mon 23 Sep 1974 Den Helder (NL)) =>