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":
Nida Bell Deal
(9 May 1886 Georgia, USA - ?? Tennessee, USA)
         ├─W Elbert Phillips
(Abt 1919 Tennessee, USA - ??)
         ├─Kermit Roosevelt Phillips
(15 Mar 1921 Red Clay, Whitfield County, Georgia, USA - 16 Nov 1990 Hamilton County, Tennessee, USA)
         │ + Lola Viola Walker
(7 Nov 1913 Georgia, USA - 4 Oct 2008 Coldwater, Tate County, Mississippi, USA)
         ├─Thurman Henry (Dock) Phillips
(6 Sep 1922 Bradley County, Tennessee, USA - 10 May 1985 DeKalb County, Georgia, USA)
         │ + Josie Mamie Letner
(25 Jul 1925 Decatur, Meigs County, Tennessee, USA - Jul 1986 Atlanta, Fulton County, Georgia, USA)
         └─Jacob E Phillips
(17 Jun 1917 Gordon County, Georgia, USA - 6 Sep 1957 Dalton, Whitfield County, Georgia, USA)
          + Mina Joe Pippin
(9 Aug 1925 Gordon County, Georgia, USA - 6 Aug 2004 Dalton, Whitfield County, Georgia, USA)