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":
Edmund Dudley (Abt 1462 - 18 Aug 1510 Tower Hill, London, England)(m. Aft 1500)
   └─John Dudley (Between 1504 and 1506 - 22 Aug 1553 Tower Hill, London, England)
    Jane Guildford (Abt 1504 - 22 Jan 1555 Chelsea, Middlesex, England)(m. Bef 1526)
       └─Guildford Dudley ( - 12 Feb 1554 Tower Hill, London, England)
        + Jane Grey, Queen of England (Oct 1537 Bradgate, Leicestershire, England -         12 Feb 1554 Tower Hill, London, England)(m. 21 May 1553 Durham House, London, England)