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":
Father: Aris van Pel (Egmond aan Zee (NL);1 Mar 1799 - Thu 16 Jan 1879)
Mother: Marijtje Groen (Egmond aan Zee (NL);Sat 10 Feb 1798 - Sun 2 Jul 1837)
Jan van Pel
(Thu 21 Jul 1831 Egmond aan Zee (NL) - Tue 18 Mar 1913 Velsen (NL))
Helena Schol (m. Sun 25 Jun 1854 Egmond aan Zee (NL))
   └─Aagje van Pel (Mon 23 Feb 1857 Egmond aan Zee (NL) - Sat 19 Oct 1935 Velsen (NL))
    Gerrit Broek (Egmond aan Zee (NL);Wed 27 Jun 1855 - Sun 23 Feb 1936)(m. Sun 24 Nov 1878 Egmond aan Zee (NL))
       └─Engeltje Broek (Fri 6 Mar 1891 Egmond aan Zee (NL) - Tue 28 Nov 1967 Rotterdam (NL))
        + Gerrit van der Snoek (Abt 1890 Maassluis (NL) - ??)(m. Thu 4 Oct 1917 Velsen (NL))