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":
         ├─ Angela Willikens
(25 Jan 1780 Roggel, Limburg, Nederland - 23 Oct 1781 Roggel, Limburg, Nederland)
         ├─ Christina Willikens
(10 May 1782 Roggel, Limburg, Nederland - 09 Sep 1822 Heythuysen, Limburg, Nederland)
         ├─ Dionisius Willikens
(18 May 1785 Roggel, Limburg, Nederland - 01 Apr 1818 Heythuysen, Limburg, Nederland)
         ├─ Theodorus Willikens
(08 Jan 1788 Roggel, Limburg, Nederland - 18 Nov 1846 Nederweert, Limburg, Nederland)
         └─ Maria Cornelia Willikens
(06 Nov 1792 Roggel, Limburg, Nederland - 17 Sep 1814 Roggel, Limburg, Nederland)