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":
Lucile Elizabeth Flannery
(3 Sep 1905 San Antonio, Bexar County, Texas, USA - 4 Sep 1984 Falls Church, Fairfax County, Virginia, USA)
Morris Robert Nelson, Sr
(20 Jan 1901 Corydon, Wayne County, Iowa, USA - 9 Feb 1985 Falls Church, Fairfax County, Virginia, USA)
         ├─Morris Robert Nelson, Jr
(14 Jul 1930 San Antonio, Bexar County, Texas, USA - 16 Jan 1992 bur.Arlington, Arlington County, Virginia, USA)
         │ + Margreth Wastenson
(28 Aug 1943 Malmo, Sweden - 24 Mar 2002)
         └─Anne Elizabeth Nelson
(17 Aug 1936 Shreveport, Bossier County, Louisiana, USA - 1 Aug 1989 Bexar County, Texas, USA)
          + Ralph Wilson Haymaker
(13 Dec 1924 Clark County, Ohio, USA - 4 Sep 1984 San Antonio, Bexar County, Texas, USA)