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":
Samuel HODGE
(29 Dec 1880 Wagga Wagga, New South Wales, Australia - 23 Mar 1951 Marrickville, New South Wales, Australia)
Lavinia Lilly ROBERTS (25 Jan 1888 Sydney, New South Wales, Australia - 30 May 1921 Temora, New South Wales, Australia)(m. 8 May 1905 Young, New South Wales, Australia)
└─Sylvia Winifred HODGE (22 Dec 1917 Temora, New South Wales, Australia - 30 Jul 1992 Padstow, New South Wales, Australia)
Reginald Herbert SKELTON (12 Mar 1910 Kogarah, New South Wales, Australia - 8 Nov 1985 Padstow, New South Wales, Australia)(m. 5 Jun 1936 Punchbowl, New South Wales, Australia)
1880 - 1951 (70 years)
Lavinia Lilly ROBERTS 
(25 Jan 1888 Sydney, New South Wales, Australia -