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: Johannes Hendrik Bell (Mon 7 Feb 1763 Rinsdorf (D) - Fri 9 May 1806 's Gravenhage (NL))
Mother: Maria Catharina Swack (Mon 8 May 1775 Straelen (D) - Thu 18 Jan 1849 Wormerveer (NL))
Johannes Jacob Bel
(Tue 4 Aug 1801 Ouddorp (NL) - Sat 19 Dec 1874 Krommenie (NL))
Neeltje Roelofs Beukman (chr.Sat 24 Nov 1804 b.Westknollendam (NL) - Thu 12 Nov 1835 Krommenie (NL))
: (m. Sun 22 Jul 1827 Uitgeest (NL))
:   ├─Johannes Hendrikus Bel (Fri 18 Aug 1826 Uitgeest (NL) - Wed 15 Dec 1869 Krommenie (NL))
:   └─Trijntje Bel (Abt 1834 Krommenie (NL) - Fri 8 Jan 1904 Egmond Binnen (NL))
Marijtje Levering (Thu 10 Sep 1801 Egmond Binnen (NL) - Thu 7 Oct 1875 Egmond aan Zee (NL))
(m. Sun 14 Feb 1836 Krommenie (NL))
   ├─Maria Catharina Bel (Krommenie (NL);Abt 1838 - Wed 6 Feb 1839)
   ├─Catharina Bel (Sun 29 Dec 1839 Krommenie (NL) - ??)
   │ + Pieter van Werven (1840/41 Egmond Binnen (NL) - ??)
   ├─Johan Jacob Bel (Abt 1846 Krommenie (NL) - Sat 26 Jul 1913 Venray (NL))
   │ Antje Kerstens (Mon 17 Jan 1842 Krommenie (NL) - ??)(m. Sun 14 May 1865 Krommenie (NL))