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: Jan Jochums Ruiter
(12 Nov 1753 Giethoorn, Overijssel, Nederland - Yes, date unknown)
Lukas Jans Ruiter
(1784 Sint Nicolaasga, Doniawerstal, Friesland, Nederland - Yes, date unknown)
Grietje Jans Oort
(12 Jul 1782 Sintjohannesga, Schoterland, Friesland, Nederland - 15 May 1860 Heerenveen, Schoterland, Friesland, Nederland)
         ├─ Lammegje Ruiter
(1805 - Yes, date unknown)
         ├─ Annigjen Lucas Ruiter
(18 Aug 1809 Rotsterhaule, Schoterland, Friesland, Nederland - Yes, date unknown)
         │ Sijtze Andries Oord
(04 Feb 1813 Sint Nicolaasga, Doniawerstal, Friesland, Nederland - Yes, date unknown)
         │          ├─ Lukas Sijtzes Oord
(Yes, date unknown - 13 Mar 1847 Lemsterland, Friesland, Nederland)
         │          ├─ Froukje Sietzes Oord
(03 Jun 1838 Echten, Lemsterland, Friesland, Nederland - Yes, date unknown)
         │          │ Hendrik Feenstra
(04 Jan 1843 Sneek, Friesland, Nederland - Yes, date unknown)
         │          │          ├─ Cornelia Feenstra
(21 Feb 1866 Sneek, Friesland, Nederland - Yes, date unknown)
         │          │          └─ Wiltje Feenstra
(11 May 1869 Sneek, Friesland, Nederland - Yes, date unknown)