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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┌──Lawrence Wingfield
(1725 Dinwiddie County, Virginia, USA - 1773 Halifax County, North Carolina, USA)
┌──William Y Wingfield
(1755 Dinwiddie County, Virginia, USA - 1816 Warren County, Kentucky, USA)
│ └──Mary Sturdivant
(21 Nov 1728 Prince George County, Virginia, USA - 29 Sep 1773 Virginia, USA)
│
┌──William Riley Wingfield, II
(7 Jan 1782 Bethania, Surry County, North Carolina, USA - 3 Mar 1856 Lavaca County, Texas, USA)
│ └──Mary Annie Messer
(1766 Dinwiddie County, Virginia, USA - 1816 Warren County, Kentucky, USA)
│
┌──William Marchbank Wingfield
(26 Feb 1810 St Clair County, Illinois, USA - 20 Nov 1868 Hempstead County, Arkansas, USA)
│ └──Sophia Echols Holcomb
(15 Apr 1788 South Carolina, USA - 12 Jan 1874 Jackson County, Texas, USA)
│
John F Wingfield (7 Mar 1848 Hempstead County, Arkansas, USA - 19 Mar 1899 Arkansas, USA)
└──Eliza Caroline Ward
(11 Mar 1816 Louisiana, USA - 11 Nov 1898 Nevada County, Arkansas, USA)