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":
Legend:
Father: John Butler (Abt 1570 of Little Birch, Essex, England - Aft 2 Aug 1634)
Mother: Jane Elliott (Bef 23 Jun 1576 chr.Roxwell, Essex, England - ??)
Thomas Butler
(Abt 1606 - Bef 16 Jan 1647 Kent Island, Maryland)
Joan (m. 16 Jan 1626 St. Magnus the Martyr, London, England)
   └─Thomas Butler (Between 1626 and 1640 London, England - Bef 27 Feb 1678 Westmoreland County, Virginia)