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":
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┌──Samuel Gillett
(22 Jan 1643 Windsor, Hartford County, Connecticut, USA - 19 May 1676 Greenfield, Franklin County, Massachusetts, USA)
Hannah Gillette (5 Sep 1674 Hatfield, Hampshire County, Massachusetts, USA - 1743 South Hadley, Hampshire County, Massachusetts, USA)
│ ┌──Nathaniel Dickinson
(May 1601 Ely, Cambridgeshire, England - 16 Jun 1676 Hadley, Hampshire County, Massachusetts, USA) =>
│ ┌──John Dickinson
(22 Aug 1624 Haverhill, Essex, England - 19 May 1676 Greenfield, Franklin County, Massachusetts, USA)
│ │ └──Anne Bincks
(Betw 1605 and 1610 England - 23 Feb 1678 Hadley, Hampshire County, Massachusetts, USA) =>
│ │
└──Hannah Dickinson
(6 Dec 1648 Amherst, Hampshire County, Massachusetts, USA - 1705 Worcester County, Massachusetts, USA)
└──Frances Foote
(1629 Ipswich, Suffolk, England - 3 Feb 1677 Hatfield, Hampshire County, Massachusetts, USA)