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":
Sarah Jane Smith
(Bledsoe County, Tennessee, USA;14 Jul 1834 - 16 Sep 1868)
James Hutcheson
(Bledsoe County, Tennessee, USA;18 Jul 1834 - 20 Mar 1908)
         ├─Rebecca Ann Hutcheson
(Abt 1862 Bledsoe County, Tennessee, USA - 1910)
         ├─Virginia E Hutcheson
(Bledsoe County, Tennessee, USA;2 Nov 1863 - 3 Nov 1896)
         │ + Leonidas Napolean Agee
(10 Mar 1864 Bledsoe County, Tennessee, USA - 18 May 1911 Bells, Grayson County, Texas, USA)
         ├─Sarah B Hutcheson
(Nov 1865 Bledsoe County, Tennessee, USA - ??)
         ├─Marcellous Hutcheson
(10 Nov 1856 Bledsoe County, Tennessee, USA - 16 Oct 1925 Cumberland County, Tennessee, USA)
         │ Ursaline Mary Worthington
(May 1861 Tennessee, USA - 31 Jan 1904 bur.Bledsoe County, Tennessee, USA)
         │ :         ├─James Brown Hutcheson
(25 May 1890 Bledsoe County, Tennessee, USA - 20 Feb 1957 Lafayette County, Florida, USA)
         │ :         ├─Lester Lee Hutcheson
(30 Nov 1899 Bledsoe County, Tennessee, USA - 28 May 1971 Umatilla County, Oregon, USA)
         │ :         │ + Hazel Wood
(11 Aug 1909 North Carolina, USA - 26 Dec 2005 Amherst, Lorain County, Ohio, USA)
         │ :         ├─William F Hutcheson
(Aug 1883 Bledsoe County, Tennessee, USA - ??)
         │ :         └─Lillie M Hutcheson
(Jun 1886 Bledsoe County, Tennessee, USA - ??)
         │ Martha Jane Evans
(19 Mar 1872 Tennessee, USA - 28 Jul 1931 Cumberland County, Tennessee, USA)
         │          ├─Allie E Hutcheson
(5 Jul 1908 Cumberland County, Tennessee, USA - 11 Feb 1986 bur.Van Buren County, Tennessee, USA)
         │          └─Verdie D Hutchinson
(Abt 1906 Cumberland County, Tennessee, USA - ??)