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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┌──John Keebler
(27 Jun 1787 Philadelphia, Philadelphia County, Pennsylvania, USA - │ 9 May 1882 Cleveland, Bradley County, Tennessee, USA) =>
┌──Samuel Keebler
(14 Feb 1820 Washington County, Tennessee, USA - 11 Dec 1899 Anderson County, Tennessee, USA)
│ └──Anna Haws
(7 Jan 1788 Washington County, Tennessee, USA - 16 Feb 1863 Tasso, Bradley County, Tennessee, USA) =>
│
┌──John Smallwood Keebler
(11 Jan 1851 Anderson County, Tennessee, USA - 1 Sep 1931 Asheville, Buncombe County, North Carolina, USA)
│ └──Rosannah Johnson
(10 Mar 1816 Dutch Valley, Anderson County, Tennessee, USA - 25 Jun 1866 Anderson County, Tennessee, USA)
│
Samuel Taylor Keebler (29 Jun 1882 Oliver Springs, Roane County, Tennessee, USA - 18 Jan 1959 Fulton County, Georgia, USA)
└──Laura A Tadlock
(18 May 1858 Tennessee, USA - 30 Jun 1935 Knoxville, Knox County, Tennessee, USA)