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":
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┌──Samuel Billingsley
(Jun 1747 St Mary's, St Mary's County, Maryland, USA - 10 Jun 1816 Bledsoe County, Tennessee, USA) =>
┌──John Billingsley
(10 Sep 1781 Onslow County, North Carolina, USA - 25 May 1856 Bledsoe County, Tennessee, USA)
│ └──Mary Griffith
(1 Sep 1753 Edgecombe County, North Carolina, USA - 1 Sep 1838 Bledsoe County, Tennessee, USA)
│
┌──Leander Travis Billingsley
(20 Oct 1843 Bledsoe County, Tennessee, USA - 12 Jun 1927 Billingsley, Bledsoe County, Tennessee, USA)
│ └──Jane T Hoodenpile
(25 Apr 1812 North Carolina, USA - 3 Sep 1894 Cold Spring, Bledsoe County, Tennessee, USA)
│
William Bates Billingsley (17 Jan 1904 Pikeville, Bledsoe County, Tennessee, USA - 16 May 1971 Dayton, Montgomery County, Ohio, USA)
└──Lucy Ann Houston
(13 May 1871 Billingsley, Bledsoe County, Tennessee, USA - 23 Apr 1956 Bledsoe County, Tennessee, USA)