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":
James STACEY
(31 Dec 1863 Stirling North, South Australia, Australia - 6 Oct 1932 Quairading, Western Australia, Australia)
Alice Elizabeth JOHNSTON (10 Dec 1868 Wallaroo, South Australia, Australia - 6 Sep 1931 Quairading, Western Australia, Australia)(m. 22 Apr 1890 Port Augusta, South Australia, Australia)
└─Leslie James STACEY (3 Oct 1904 Caversham, Western Australia, Australia - 2 Mar 1972 London, England)
Teresa Muriel Lily BRYANT (23 Jun 1903 North Perth, Western Australia, Australia - 25 Oct 2004 Quairading, Western Australia, Australia)(m. 23 Jun 1928 Fremantle, Western Australia, Australia)
├─Bryant James STACEY (12 Mar 1932 Beverley, Western Australia, Australia - 2010)
1863 - 1932 (68 years)
Alice Elizabeth JOHNSTON 
(10 Dec 1868 Wallaroo, South Australia, Australia -