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":
Melissa Adelma Wright
(2 Mar 1847 Maine, USA - 10 Mar 1945 Crewe, Nottoway County, Virginia, USA)
John Griffin Nelson
(Jun 1839 Indiana, USA - 28 Dec 1936 Crewe, Nottoway County, Virginia, USA)
         ├─Miles Asa Nelson
(19 Oct 1876 Farmington, Polk County, Wisconsin, USA - 5 Jul 1971 Cook, St Louis County, Minnesota, USA)
         │ Randa 'Mathilda' Wold
(27 Mar 1890 Minneapolis, Hennepin County, Minnesota, USA - 3 Mar 1957 Itasca County, Minnesota, USA)
         │          ├─John Louis Nelson
(16 Sep 1912 Bear River, St Louis County, Minnesota, USA - 19 Sep 1990 Kingsville, Kleberg County, Texas, USA)
         │          │ + Irene Elizabeth Whitworth
(29 Jul 1916 Red Rock, Bastrop County, Texas, USA -          │          │ 12 Feb 2007 Raleigh, Wake County, North Carolina, USA)
         │          └─Vernon Lawrence Nelson
(11 May 1909 Bearville, Itasca County, Minnesota, USA -          │           30 Nov 2004 Hibbing, St Louis County, Minnesota, USA)
         │           + Irene M Dall
(Abt 1919 Minnesota, USA - ??)
         ├─Marshall Overturf Nelson
(29 Oct 1879 Farmington, Polk County, Wisconsin, USA - 15 Nov 1968 Sylmar, Los Angeles County, California, USA)
         │ + Anna Belle Walk
(11 Dec 1888 Downey, Los Angeles County, California, USA - 15 Apr 1957 Los Angeles County, California, USA)
         │ Rose Mae Nelson
(29 Nov 1887 Minnesota, USA - 2 Nov 1968 Los Angeles County, California, USA)
         │          ├─Marion Marshall Nelson
(9 Nov 1908 Colorado, USA - 28 May 1997 Marion County, Oregon, USA)
         │          │ Mildred V Green
(24 Jul 1910 St Louis, St Louis County, Missouri, USA - 11 Mar 1998 Seattle, King County, Washington, USA)
         │          ├─Harriet R Nelson
(Abt 1911 California, USA - ??)
         │          └─Elva Ruth Nelson
(7 Oct 1919 San Fernando, Los Angeles County, California, USA -          │           10 Jan 2003 Eagle River, Anchorage County, Alaska, USA)
         │           + Living
         ├─Von Oscar Nelson
(27 Sep 1881 Greenwood County, Kansas, USA - 7 Sep 1945 Crewe, Nottoway County, Virginia, USA)
         ├─Elmer Brian Nelson
(16 Mar 1887 Osceola, Polk County, Wisconsin, USA - May 1968 Hillsdale, Columbia County, New York, USA)
         │ Bertha Anna Getschel
(17 Mar 1887 Osceola, Polk County, Wisconsin, USA - 1936 bur.West Copake, Columbia County, New York, USA)
         │          ├─Olive M Nelson
(Abt 1917 Columbia County, New York, USA - 3 Apr 2011 bur.Martindale, Columbia County, New York, USA)
         │          │ + Leroy Emmet Michael
(25 May 1913 - 23 Apr 1977 bur.Martindale, Columbia County, New York, USA)
         │          ├─Griffin G Nelson
(Abt 1917 Columbia County, New York, USA - ??)
         │          ├─Helen Anna Nelson
(19 Apr 1932 Copake, Columbia County, New York, USA - 2 Nov 2005 Windsor, Broome County, New York, USA)
         │          │ + Living
         └─William Thompson Nelson
(1 Oct 1868 Somerset, St Croix County, Wisconsin, USA - 18 Jun 1958 Matoaca, Chesterfield County, Virginia, USA)
          Maria Montgomery
(Abt 1874 Ireland - 1918 bur.Osceola, Polk County, Wisconsin, USA)
                   ├─Marjorie Helen Nelson
(12 Mar 1907 Farmington, Polk County, Wisconsin, USA -                    │ 29 Mar 1969 Matoaca, Chesterfield County, Virginia, USA)
                   │ + Russell I Burch
(18 Jan 1904 Texas, USA - 14 Jun 1974 Petersburg, Petersburg County, Virginia, USA)
                   └─Robert Henry Nelson
(East Farmington, Polk County, Wisconsin, USA;17 Feb 1906 - 4 Jun 1906)