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":
Mother: Narcissa Ann Myers (10 Feb 1834 Warren County, Tennessee, USA - 6 Nov 1896 Cold Spring, Bledsoe County, Tennessee, USA)
Susan Evalista (Eva) Hutcheson
(27 Feb 1871 Bledsoe County, Tennessee, USA - 3 Aug 1958 Evansville, Vanderburgh County, Indiana, USA)
William Emmitt Walker
(23 Aug 1867 Bledsoe County, Tennessee, USA - 16 Dec 1931 Winchester, Franklin County, Tennessee, USA)
         ├─Rena Lynn Walker
(12 Apr 1896 Winchester, Franklin County, Tennessee, USA - ??)
         │ + Bascomb Spence Holden
(22 Jan 1897 Link, Rutherford County, Tennessee, USA - 24 Feb 1978)
         ├─Willanna May Walker
(5 May 1898 Winchester, Franklin County, Tennessee, USA - 11 May 1989 Mountain Lakes, Morris County, New Jersey, USA)
         │ + Walter Shaw Miles
(30 Dec 1895 Parkrose, Bergen County, New Jersey, USA - Dec 1981 Mountain Lakes, Morris County, New Jersey, USA)
         └─Evelyn G Walker
(13 Oct 1911 Winchester, Franklin County, Tennessee, USA - 8 Mar 1997 Cache, Comanche County, Oklahoma, USA)
          + John Joel Stowe, Jr
(11 Jun 1908 Tennessee, USA - 10 Dec 1987 Lawton, Comanche County, Oklahoma, USA)