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":
Elijah Keebler
(1822 Washington County, Tennessee, USA - 23 Apr 1904 Chattanooga, Hamilton County, Tennessee, USA)
         ├─Samuel M Keebler
(Abt 1851 Bradley County, Tennessee, USA - ??)
         ├─L Berry (Littlebery) Keebler
(10 Aug 1854 Bradley County, Tennessee, USA - 4 Sep 1918 McDonald, Bradley County, Tennessee, USA)
         │ Living
         │          └─Littleman Keebler
(McDonald, Bradley County, Tennessee, USA;4 Feb 1889 - 28 Jun 1889)
         ├─Dora Keebler
(Abt 1856 Bradley County, Tennessee, USA - ??)
         ├─Harriett Keebler
(Abt 1856 Bradley County, Tennessee, USA - ??)
         ├─John K Keebler
(Abt 1859 Bradley County, Tennessee, USA - ??)
         ├─Abraham Lincoln Keebler
(4 Jul 1861 Bradley County, Tennessee, USA - 28 Jan 1933 Cleveland, Bradley County, Tennessee, USA)
         │ Betty Atchley
(Dec 1862 Tennessee, USA - ??)
         │ :         ├─Eva C Keebler
(Sep 1884 Bradley County, Tennessee, USA - ??)
         │ :         ├─Minnie L Keebler
(Mar 1884 Bradley County, Tennessee, USA - ??)
         │ :         ├─Virgie M Keebler
(Dec 1888 Bradley County, Tennessee, USA - ??)
         │ :         ├─Jesse L Keebler
(Oct 1892 Tennessee, USA - ??)
         │ :         ├─Carrie M Keebler
(Apr 1895 Bradley County, Tennessee, USA - ??)
         │ :         ├─Lois T Keebler
(Oct 1897 Bradley County, Tennessee, USA - ??)
         │ :         └─Hattie Agnes Keebler
(28 Aug 1899 McDonald, Bradley County, Tennessee, USA - Oct 1982)
         │ + Janie Law
(22 Aug 1880 Tennessee, USA - 6 Jan 1967 McDonald, Bradley County, Tennessee, USA)
         ├─William Keebler
(Abt 1864 Bradley County, Tennessee, USA - ??)
         └─Agnes Keebler
(Abt 1867 Tennessee, USA - ??)