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":
Mary Tate Finley
(1 Sep 1855 Augusta County, Virginia, USA - 13 May 1884 Lewisburg, Greenbrier County, West Virginia, USA)
John William Arbuckle
(Greenbrier County, West Virginia, USA;26 Apr 1850 - 30 Jan 1925)
         ├─Finley McCue Arbuckle
(14 Aug 1879 Lewisburg, Greenbrier County, West Virginia, USA - 14 Aug 1950 Greenbrier County, West Virginia, USA)
         │ + Ann M ??
(Abt 1912 Pennsylvania, USA - ??)
         ├─James Edward Arbuckle
(5 Oct 1880 Lewisburg, Greenbrier County, West Virginia, USA -          │ 26 Jun 1920 bur.Lewisburg, Greenbrier County, West Virginia, USA)
         ├─Mary Hale Arbuckle
(29 Dec 1882 Lewisburg, Greenbrier County, West Virginia, USA - 18 Apr 1953 Kanawha County, West Virginia, USA)
         └─John Tate Arbuckle
(10 May 1884 Lewisburg, Greenbrier County, West Virginia, USA - 18 Oct 1950 Raleigh County, West Virginia, USA)
          Virginia D Murrill
(3 Dec 1886 Greenbrier County, West Virginia, USA - 30 Jan 1955 Charleston, Kanawha County, West Virginia, USA)
                   └─John William Arbuckle
(Charleston, Kanawha County, West Virginia, USA;21 Jul 1912 - 18 Sep 1952)
                    Janet Nelson
(27 Dec 1916 Cuyahoga County, Ohio, USA - 12 Aug 1958 Charleston, Kanawha County, West Virginia, USA)