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":
William D Hassell
(3 Dec 1814 South Carolina, USA - 18 Aug 1895 Dalton, Whitfield County, Georgia, USA)
:         └─Sarah A Hassell
(Abt 1859 Georgia, USA - ??)
Julia Elizabeth Inman
(7 Jun 1840 Tennessee, USA - 1 Jan 1902 bur.Dalton, Whitfield County, Georgia, USA)
:         ├─Andrew W Hassell
(Abt 1862 Georgia, USA - 1920 Rhea County, Tennessee, USA)
:         ├─Ella J Hassell
(21 Feb 1867 Atlanta, DeKalb County, Georgia, USA - 23 Nov 1944 Jackson, Madison County, Tennessee, USA)
:         ├─Charles Hassell
(Abt 1872 Georgia, USA - ??)
:         ├─Mary Leota Hassell
(12 Sep 1875 Georgia, USA - 20 Aug 1953 Knoxville, Knox County, Tennessee, USA)
:         │ + William Jackson Million
(6 Feb 1876 Tennessee, USA - 9 Oct 1950 Knoxville, Knox County, Tennessee, USA)
:         └─William H Hassell
(2 Feb 1873 Georgia, USA - 2 Nov 1954 Knoxville, Knox County, Tennessee, USA)
         ├─James A Hassell
(Apr 1836 Georgia, USA - 9 Feb 1908 Menlo, Chattooga County, Georgia, USA)
         │ + Mary Brackney Womble
(5 Oct 1825 Tennessee, USA - 21 Nov 1897 Cleveland, Bradley County, Tennessee, USA)
         └─Malisa Hassel
(Abt 1837 Georgia, USA - ??)