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":
Catherine Bacon
(Washington County, Tennessee, USA;20 Apr 1808 - ??)
         ├─James C. Fulkerson
(30 Nov 1830 Tennessee, USA - 20 Dec 1902 bur.Washington County, Tennessee, USA)
         ├─Amanda Fulkerson
(Abt 1831 Tennessee, USA - ??)
         ├─Charles Fulkerson
(Abt 1832 Tennessee, USA - ??)
         ├─Milton Monroe Fulkerson
(10 Nov 1833 Tennessee, USA - 2 Jan 1911 Washington County, Tennessee, USA)
         │ + Mary E Kincheloe
(17 Aug 1839 Tennessee, USA - 26 Mar 1904 Washington County, Tennessee, USA)
         ├─Abram Fulkerson
(Abt 1840 Tennessee, USA - ??)
         ├─Thomas M Fulkerson
(Abt 1842 Sullivan County, Tennessee, USA - ??)
         ├─Delcena Fulkerson
(Abt 1844 Sullivan County, Tennessee, USA - ??)
         └─Mary C Fulkerson
(20 Jan 1846 Tennessee, USA - 8 Aug 1917 bur.Rock Springs, Sullivan County, Tennessee, USA)
          + James Horace Kincheloe, Jr
(13 May 1834 Washington County, Tennessee, USA - 25 Sep 1900 bur.Rock Springs, Sullivan County, Tennessee, USA)