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: Jacobus Johannes van den Berg
(08 Mar 1888 Aduard, Groningen, Nederland - 13 Aug 1966 Groningen, Groningen, Nederland)
Mother: Margien Arnolli
(06 Feb 1887 Groningen, Groningen, Nederland - 31 Aug 1968 Groningen, Groningen, Nederland)
Frouwke Maria van den Berg
(21 Aug 1915 Groningen, Groningen, Nederland - Jan 2004 New Westminster, British Columbia, Canada)
         ├─ Siverinus Harmannus Savenije
(09 Oct 1937 Groningen, Groningen, Nederland -          │ 28 Jul 2002 Lake Louise Near The Summit Of Mount Fairview, Alberta, Canada)
         │ Living
         │          ├─ Living
         │          ├─ Paul Savenije
(18 Sep 1964 Tacoma Park, Tacoma, Pierce County, Washington, USA -          │          │ 11 Jun 2001 New Westminster, British Columbia, Canada)
         │          │ + Terry
(Yes, date unknown - Yes, date unknown)
         │          └─ Living
         ├─ Living
         │ Living
         │          ├─ Living
         │          └─ Living
         ├─ Living
         │ + Living
         │ + David Evans
(03 Apr 1923 USA - Dec 1982 USA)
         └─ Francis Henricus Fredericus Savenije
(02 Apr 1945 Sneek, Friesland, Nederland - 28 Aug 2020 Nanaimo, British Columbia, Canada)
          Marie Beatch
(Yes, date unknown - Yes, date unknown)
          :         ├─ Living
          :         ├─ Laura Savenije
(02 Nov 1969 - 31 Jan 1970)
          :         ├─ Living
          :         └─ Living
          Living
                   ├─ Living
                   └─ Living