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: James Madison, Sr (27 Mar 1723 Port Conway, King George County, Virginia, USA - 27 Feb 1801 Montpelier Station, Orange County, Virginia, USA)
Mother: Eleanor Rose (Nelly) Conway (9 Jan 1731 Port Conway, King George County, Virginia, USA - 11 Feb 1829 Madison Family Cemetery, Montpelier Station, Orange County, Virginia, USA)
(General) William Taylor Madison
(1 May 1762 Orange County, Virginia, USA - 19 Jul 1843 Woodberry Forest, Madison County, Virginia, USA)
Frances Throckorton
(24 Feb 1765 - 20 Aug 1832 bur.Montpelier Station, Orange County, Virginia, USA)
         ├─(Major) Ambrose Madison
(Woodberry Forest, Madison County, Virginia, USA;12 Mar 1796 - 26 Dec 1855)
         │ Jane Bankhead Willis
(Abt 1803 Virginia, USA - 1862)
         │ :         └─James Ambrose Madison
(Orange County, Virginia, USA;14 Jul 1828 - 28 Jun 1901)
         │ :          + Fannie B Willis
(9 Apr 1842 Orange County, Virginia, USA - 28 Oct 1899 bur.Montpelier Station, Orange County, Virginia, USA)
         ├─Robert Lewis Madison
(4 Mar 1794 Culpeper County, Virginia, USA - 9 Feb 1828 Orange County, Virginia, USA)
         └─John Madison
(31 May 1787 Madison, Madison County, Virginia, USA - 23 Mar 1809 Orange, Orange County, Virginia, USA)