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: Ezekiel Shepard Thacker (6 Oct 1814 Savannah, Hardin County, Tennessee - 22 Jan 1899 Hardin County, Tennessee)
John Thacker
(25 Nov 1851 Hardin County, Tennessee - 15 Sep 1934 Mount Pleasant, Titus County, Texas)
Sarah Frances Haggard (16 Dec 1852 Tennessee - 10 Nov 1881 bur.Swift, Hardin County, Tennessee)
: (m. 14 Jul 1877 Hardin County, Tennessee)
:   └─Emery Thacker (17 Jan 1879 - 1 Jul 1898 bur.Swift, Hardin County, Tennessee)
Emma E. Pitts (Apr 1858 Tennessee - ??)(m. 19 Feb 1891 Hardin County, Tennessee)
   └─Alice Thacker (1 Feb 1890 Tennessee - 26 Dec 1983 Titus County, Texas)
    + Luther Marvin Pool (27 Aug 1883 Savannah, Hardin County, Tennessee -     4 Jul 1974 Mount Pleasant, Titus County, Texas)(m. 4 May 1910 Titus County, Texas)