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: Hendrik van Achteren
(12 Aug 1871 Appelscha, Ooststellingwerf, Friesland, Nederland - 23 Oct 1939 Oude Pekela, Groningen, Nederland)
Mother: Hinderkien Panman
(09 Apr 1873 Stadskanaal, Groningen, Nederland - 13 Aug 1946 Winschoten, Groningen, Nederland)
Wicher van Achteren
(21 Oct 1899 Westerlee, Scheemda, Groningen, Nederland - Yes, date unknown)
Marchien Drenth
(25 Feb 1900 Westerlee, Scheemda, Groningen, Nederland - Yes, date unknown)
         ├─ Hendrik van Achteren
(21 Jul 1918 Oude Pekela, Groningen, Nederland - 05 Oct 1983 Oude Pekela, Groningen, Nederland)
         │ Geessien Bronsema
(08 Nov 1917 Oude Pekela, Groningen, Nederland - 24 Sep 1998 Oude Pekela, Groningen, Nederland)
         │          └─ Living
         │                    ├─ Living
         │                    │ + Living
         │                    ├─ Living
         │                    │ + Living
         │                    └─ Living
         ├─ Harmina van Achteren
(25 Sep 1919 Oude Pekela, Groningen, Nederland - 06 Mar 1921 Oude Pekela, Groningen, Nederland)