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":
Mary E Brim
(17 Nov 1841 North Carolina, USA - 20 Jan 1872 Rockingham County, North Carolina, USA)
Willis Craven Truitt
(5 Apr 1835 North Carolina, USA - 8 Jul 1921 Marion, Smyth County, Virginia, USA)
         ├─Annie Brim Truitt
(13 Apr 1866 Rockingham County, North Carolina, USA - 9 Mar 1929 Reidsville, Rockingham County, North Carolina, USA)
         │ + John Raleigh North
(1 Sep 1868 Rockingham County, North Carolina, USA - ?? bur.Reidsville, Rockingham County, North Carolina, USA)
         ├─Sarah McGruder Truitt
(8 Feb 1861 Reidsville, Rockingham County, North Carolina, USA - 14 Apr 1951 Washington, District of Columbia, USA)
         │ + James Turner Wells
(26 Mar 1852 Reidsville, Rockingham County, North Carolina, USA - 3 Jul 1937 Washington, District of Columbia, USA)
         ├─Martha J Truitt
(Abt 1865 Rockingham County, North Carolina, USA - ??)
         └─Monroe Truitt
(Abt 1869 Rockingham County, North Carolina, USA - ??)