The paper length is not relevant since the chart flows from one page to the next.
Mobile
in.
mm
Staand
2.75
70
For smart phones, not for printing
Liggend
5.5
140
For smart phones, not for printing
International
in.
mm
A5 Staand
5.82
148
A4 Staand
8.25
210
Also A5 Liggend
A4 Liggend
11.71
297
Also A3 Liggend
A3 Liggend
16.54
420
USA & Canada
in.
mm
Letter Staand
8.5
216
Also Legal Staand
Letter Liggend
11
279
Legal Liggend
14
356
Also Ledger Staand
Ledger Liggend
17
432
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":
:   │    │ :   └─Maria Christina Johanna Vosveld (29 aug 1882 's Gravenhage - 1 jan 1947 Nijmegen)
:   │    │ + Johannes Hendrik van Boeckholt (4 jan 1851 Brouwershaven - :   │    │ 1 nov 1917 Nijmegen)(huw. 30 dec 1909 Nijmegen)
:   │    │    ├─Lambertus Frederik Jansen (15 jun 1896 Rotterdam - 8 feb 1979 Poortugaal)
:   │    │    │ Maria van der Harst (22 okt 1897 Middelburg - 10 feb 1971 Rotterdam)
:   │    │    │ (huw. 28 feb 1922 Middelburg)
:   │    │    │    ├─Johanna Jacoba Jansen (Rotterdam;23 jan 1925 - 23 mei 2014) =>
:   │    │    │    │ + Leendert Dinardus Klok (17 dec 1917 Rockanje - 20 jun 2011 Rotterdam)
:   │    │    │    │ (huw. 15 aug 1946 Rotterdam)
:   │    │    │    └─Henriette Louise Jansen (Rotterdam;7 apr 1927 - 16 aug 2014) =>
:   │    │    │     + Hendricus van den Heuvel (Rotterdam;16 aug 1926 - 29 jan 2022)(huw. 22 okt 1952 Rotterdam)