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":
Martha 'Ada' Seitz
(19 Aug 1876 Spencer, Van Buren County, Tennessee, USA - 20 May 1961 Pikeville, Bledsoe County, Tennessee, USA)
         ├─Thomas Joe Hutcheson
(Cold Spring, Bledsoe County, Tennessee, USA;12 May 1903 - 27 Nov 1983)
         │ Katherine Baker Matthews
(1 Feb 1906 Bledsoe County, Tennessee, USA - 3 Jul 1985 Cold Spring, Bledsoe County, Tennessee, USA)
         │          │ Thomas Howard Ellington
(16 Mar 1925 Wartrace, Bedford County, Tennessee, USA -          │          │ 12 Jun 1998 Tullahoma, Coffee County, Tennessee, USA)
         │          ├─Clyde Matthews Hutcheson
(12 Jul 1940 Bledsoe County, Tennessee, USA -          │          │ 14 Feb 2015 Mills River, Henderson County, North Carolina, USA)
         │          │ Donna Lee Moore
(3 Mar 1938 Madison County, North Carolina, USA - 16 Dec 1992 Horse Shoe, Henderson County, North Carolina, USA)
         │          │           + Living
         │          ├─Joe Thomas Hutcheson
(Cold Spring, Bledsoe County, Tennessee, USA;21 Jun 1932 - 13 Dec 2001)
         │          ├─Infant Daughter Hutcheson
(Cold Spring, Bledsoe County, Tennessee, USA;17 Nov 1927 - 17 Nov 1927)
         ├─Robert Lee Hutcheson
(27 May 1911 Cold Spring, Bledsoe County, Tennessee, USA - 27 Feb 1963 Pikeville, Bledsoe County, Tennessee, USA)
         │ Clara 'Lucille' Simmons
(21 Sep 1912 Pikeville, Bledsoe County, Tennessee, USA - 12 Dec 1997 Hixson, Hamilton County, Tennessee, USA)