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":
Father: Nathaniel Dickinson (May 1601 Ely, Cambridgeshire, England - 16 Jun 1676 Hadley, Hampshire County, Massachusetts, USA)
Mother: Anne Bincks (Between 1605 and 1610 England - 23 Feb 1678 Hadley, Hampshire County, Massachusetts, USA)
Nehemiah Dickinson, Sr
(15 Aug 1643 Wethersfield, Hartford County, Connecticut, USA - 9 Sep 1723 Hadley, Hampshire County, Massachusetts, USA)
Mary Cowles
(27 Jun 1654 Farmington, Hartford County, Connecticut, USA - 5 Mar 1726 Hatfield, Hampshire County, Massachusetts, USA)
         ├─William Dickinson
(18 May 1675 Hatfield, Hampshire County, Massachusetts, USA - 24 Jun 1742 bur.Hadley, Hampshire County, Massachusetts, USA)
         ├─Rebekah Dickinson
(Hatfield, Hampshire County, Massachusetts, USA;2 Apr 1699 - 2 Oct 1726)
         ├─Nehemiah Dickinson
(5 Jun 1672 Hatfield, Hampshire County, Massachusetts, USA -          │ 1 Oct 1715 South Hatfield, Hampshire County, Massachusetts, USA)
         ├─Ebenezer Dickinson
(17 Sep 1696 Hatfield, Hampshire County, Massachusetts, USA - 24 Dec 1780 Amherst, Hampshire County, Massachusetts, USA)
         ├─Israel Dickinson
(Hatfield, Hampshire County, Massachusetts, USA;16 Mar 1691 - Apr 1733)
         └─John Dickinson
(Hatfield, Hampshire County, Massachusetts, USA;14 Feb 1676 - 16 Feb 1676)