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":
Joseph TURNER
(Abt 1814 Lancashire, England - Bef 1869)
Mary UNKNOWN (Abt 1816 Lancashire, England - DECEASED)
└─Elizabeth TURNER (1845 Whitechapel, Middlesex, England - 8 Nov 1898 Bow, Middlesex, England)
Peter JULIUS (24 Aug 1838 Nußbaum, Bad Kreuznach, Rheinland-Pfalz, Germany - 10 Jan 1910 Bromley, Middlesex, England)(m. 8 Feb 1869 Mile End Old Town, London, England)
└─Peter JULIUS (21 Aug 1869 Mile End, Middlesex, England - 18 Sep 1934 Camberwell, Surrey, England)
Alice Elizabeth MOORE (11 Dec 1871 Bethnal Green, Middlesex, England - 5 Nov 1935 Camberwell, Surrey, England)(m. 25 Mar 1894 Bromley, Middlesex, England)
└─William Peter JULIUS (31 Dec 1894 Bromley, Middlesex, England - 23 Mar 1988 Chichester, Sussex, England)
Alice Muriel SMITH (13 Jan 1914 London, London, England - 24 Sep 1983 Midhurst, Sussex, England)
Abt 1814 - Bef 1869 (~ 54 years)
Peter JULIUS 
(24 Aug 1838 Nußbaum, Bad Kreuznach, Rheinland-Pfalz, Germany -