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":
Father: James William BETTERIDGE
(26 Sep 1872 Henefer, Summit, Utah, USA - 10 Apr 1961 Salt Lake City, Salt Lake, Utah, USA)
Mother: Emily NESS
(4 Dec 1880 Scarborough, Yorkshire, England - 11 Jun 1953 Salt Lake City, Salt Lake, Utah, USA)
Verna Marion Ness BETTERIDGE
(25 Jan 1912 Grouse Creek, Box Elder, Utah, USA - 4 Apr 1991 Salt Lake City, Salt Lake, Utah, USA)
Everett Holladay BELCHER
(9 Mar 1915 Spring Lake, Utah, Utah, USA - 23 Jul 2004 Salt Lake City, Salt Lake, Utah, USA)
         ├─Everett Holladay BELCHER
(Payson, Utah, Utah, USA;29 Dec 1943 - 29 Dec 1943)
         └─Dee Alan BELCHER
(5 Apr 1950 Murray, Salt Lake, Utah, USA - 29 Aug 2018 Salt Lake City, Salt Lake, Utah, USA)