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":
         └─Freda Vianna Hutcheson
(Cold Spring, Bledsoe County, Tennessee, USA;4 Nov 1896 - 4 Jan 1981)
          Charles Emmitt Brown
(Cold Spring, Bledsoe County, Tennessee, USA;21 Dec 1892 - 28 May 1955)
                   ├─Frances Elizabeth Brown
(6 May 1921 Bledsoe County, Tennessee, USA - 5 Jun 2011 Franklin, Williamson County, Tennessee, USA)
                   │ + Howard Farmer
(14 Mar 1914 Bledsoe County, Tennessee, USA - 18 Jul 1986 Pikeville, Bledsoe County, Tennessee, USA)
                   ├─Sallie Blanch Brown
(15 May 1926 Bledsoe County, Tennessee, USA - 29 Apr 2013 Pikeville, Bledsoe County, Tennessee, USA)
                   │ Florian Dale Hannah
(5 Dec 1925 Maryland, USA - 18 Nov 1987 Chattanooga, Hamilton County, Tennessee, USA)
                   │ :         │ + Living
                   │ :         │ + Living
                   │ :         └─James Edward Hannah
(20 Dec 1957 Annapolis, Anne Arundel County, Maryland, USA -                    │ :          25 Sep 2006 Pikeville, Bledsoe County, Tennessee, USA) =>
                   │ :          + Living
                   │ + Living
                   └─William Clarence Brown
(29 Oct 1916 Bledsoe County, Tennessee, USA - 9 Apr 2001 Pikeville, Bledsoe County, Tennessee, USA)
                    Elizabeth Mae Frazier
(3 Jul 1929 Bledsoe County, Tennessee, USA - 14 Aug 2011 Pikeville, Bledsoe County, Tennessee, USA)