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: Reuben Rankin (25 May 1826 Tennessee, USA - 15 Feb 1877 Cold Spring, Bledsoe County, Tennessee, USA)
Mother: Theolia Billingsley (Bledsoe County, Tennessee, USA;14 Oct 1832 - 27 Dec 1908)
Martha Melcina (Cinnie) Hutcheson
(24 Mar 1857 Pikeville, Bledsoe County, Tennessee, USA - 22 Nov 1907 Cold Spring, Bledsoe County, Tennessee, USA)
         └─James 'Byron' Rankin
(20 Mar 1880 Bledsoe County, Tennessee, USA - 22 Jul 1927 Pikeville, Bledsoe County, Tennessee, USA)
          Alice Stepp
(Cold Spring, Bledsoe County, Tennessee, USA;9 Oct 1882 - 15 Sep 1966)
                   └─John Marshall Rankin
(8 Sep 1900 Bledsoe County, Tennessee, USA - Sep 1980 Spring City, Rhea County, Tennessee, USA)
                    + Daisy Elaine Pittman
(12 Nov 1907 Tennessee, USA - 17 Jul 1979 Spring City, Rhea County, Tennessee, USA)