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":
Julia Alpha Lutes
(4 Aug 1886 Greenville, Wayne County, Missouri, USA - May 1972 Ironton, Iron County, Missouri, USA)
William Irvin McCutcheon
(10 Jun 1873 Bedford, Lawrence County, Indiana, USA - 20 Feb 1947 Bismarck, St Francois County, Missouri, USA)
         ├─Estella Syvesta McCutcheon
(2 Nov 1914 Farmington, St Francois County, Missouri, USA -          │ 25 Nov 1992 Fredericktown, Madison County, Missouri, USA)
         │ + Harry L Boen
(13 Apr 1912 - 2 Jan 1981 Fredericktown, Madison County, Missouri, USA)
         ├─Velma Hazel McCutcheon
(20 May 1919 Bismarck, St Francois County, Missouri, USA - 6 Jul 2009 De Soto, Jefferson County, Missouri, USA)
         │ + Living
         │ + Aloysius Wobbe
(Abt 1915 Illinois, USA - 7 Nov 1993 Desoto, Jefferson County, Missouri, USA)
         ├─Joseph Lee McCutcheon
(6 Jan 1911 Greenville, Wayne County, Missouri, USA - 12 Jan 1993 St Louis, St Louis County, Missouri, USA)
         │ Blanche ??
(Abt 1913 Missouri, USA - ??)