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":
Herbert Laurence RICKARD
(6 Jul 1873 Portland, Victoria, Australia - 10 Jun 1935 West Midland, Western Australia, Australia)
Roseclair Adeline May HOWELL (Nov 1886 Guildford, Western Australia, Australia - 14 May 1976 Bassendean, Western Australia, Australia)(m. 23 Apr 1908 East Coolgardie, Western Australia, Australia)
└─Mona Adeline RICKARD (13 Dec 1910 - 27 Jul 2005 Swan View, Western Australia, Australia)
Norman Lindsay CATCHPOLE (8 May 1910 Mount Helena, Western Australia, Australia - 9 Mar 1993 Midland, Western Australia, Australia)
1873 - 1935 (61 years)
Roseclair Adeline May HOWELL 
(Nov 1886 Guildford, Western Australia, Australia - 14 May 1976 Bassendean, Western 