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":
:   │    │ :   │ + Thomas Johannes Balfoort (17 nov 1874 Culemborg - 6 feb 1949 Rotterdam)
:   │    │ :   │ (huw. 9 nov 1898 Rotterdam)
:   │    │    ├─Dorothea van den Heuvel (2 jan 1881 Delfshaven - 24 mrt 1958 Venray)
:   │    │    ├─Pieternella van den Heuvel (7 nov 1882 Rotterdam - :   │    │    │ 24 jun 1961 Battle Creek, Michigan, Verenigde Staten)
:   │    │    ├─Egberdina van den Heuvel (12 feb 1885 Delfshaven - ??)
:   │    │    ├─Gerardus van den Heuvel (2 sep 1886 Delfshaven - ??)
:   │    │    ├─Johannes van den Heuvel (8 mrt 1888 Rotterdam - ??)
:   │    │    ├─Hendricus van den Heuvel (Rotterdam;15 jan 1890 - 8 jan 1892)
:   │    │    ├─Adrianus van den Heuvel (28 okt 1891 Rotterdam - 8 mrt 1930 Oneida. VERENIGDE STATEN)