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":
Sheesley, Mr Paul Calvin
(13 Feb 1889 Jefferson, Pennsylvania, United States of America - 30 Mar 1951 Lamartine, Clarion, Pennsylvania, United States of America)
├─Sheesley Harnish, Mrs Helen Marie
(26 May 1931 Elk City, Clarion, Pennsylvania, United States of America - │ 25 Apr 2015 Knox, Clarion, Pennsylvania, United States of America)
└─Sheesley Amsler, Mrs Bessie E
(24 Sep 1933 Knox, Clarion, Pennsylvania, United States of America - 29 Jul 2018 Sligo, Clarion, Pennsylvania, United States of America)
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1896 - 1955 (58 years)
Sheesley, Mr Paul Calvin 
(13 Feb 1889 Jefferson, Pennsylvania, United States of America -
