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":
   │    │    │    │ Frhr. Carl Johan Mellin (21 Dec 1776 Viiala i Akkas - 28 Sep 1817 Haudois i Akkas)(m. 14 Apr 1800 Haudois i Akkas)
   │    │    │    │ :   ├─Frn. Agneta Augusta Ulrika Mellin (Haudois i Akkas;14 Jun 1801 - 6 Oct 1803)
   │    │    │    │ :   ├─Frn. Augusta Agneta Carolina Mellin (17 Jun 1803 - 18 Aug 1854)
   │    │    │    │ :   ├─Frhr. Bernt Gustaf Mellin (29 Dec 1804 Haudois i Akkas - 30 Jan 1875 Åbo) =>
   │    │    │    │ :   │ + Frederika Gustav Lilliebrunn (21 Oct 1806 - 2 May 1900 Helsingfors)(m. 4 Jan 1827 Kutila i Kalvola)
   │    │    │    │ :   ├─Frn. Beata Sofia Vilhelmina Mellin (3 Mar 1808 Akkas - 13 Sep 1809)
   │    │    │    │ :   ├─Frhr. Carl Axel Mellin (4 Oct 1810 - 26 Aug 1813)
   │    │    │    │ :   ├─Frhr. Carl Vilhelm Hannibal Mellin (4 Feb 1814 - 30 Jun 1814 Haudois i Akkas)
   │    │    │    │ :   └─Frhr. Gustaf Adolf Mellin (23 Dec 1815 Haudois i Akkas - 9 Dec 1853 Moinby i Borg) =>
   │    │    │    │ :    + Frn. Agneta Charlotta Vilhelmina Mellin (1 Aug 1816 - 19 Sep 1892 Helsingfors)(m. 21 Aug 1842 Sannäs i Borg)
   │    │    │    │ + Adolf Johan Lilliebrunn (1770 - 1828)(m. 24 Jun 1819)
   │    │    │    ├─Frn. Anna Augusta Lovisa Mellin (8 Dec 1781 - 26 Jan 1846)
   │    │    │    │ + Johann Frederik Tammelander (Urdiala;22 Nov 1786 - 10 Jun 1838)(m. 4 Mar 1819)
   │    │        │    │ + Frhr. Gustaf Adolf Mellin (23 Dec 1815 Haudois i Akkas - 9 Dec 1853 Moinby i Borg)(m. 21 Aug 1842 Sannäs i Borg)
   │    │        │    └─Frn. Augusta Constance Mellin (4 Dec 1817 Åbo - 29 May 1843 Helsingfors)
   │    │        │     + Frhr. Anders Edvard Ramsay (1799 - 1877)(m. 12 Aug 1840 Helsingfors)
   │    │        ├─Frhr. Carl Johan Mellin (21 Dec 1776 Viiala i Akkas - 28 Sep 1817 Haudois i Akkas)
   │    │        │    └─ This couple were related to each other. Any descendants have been already been listed
   │    │        └─Frn. Sofia Juliana Mellin (Viiala i Akkas;11 Mar 1778 - 2 Mar 1835)
   │    │         + Frhr. Carl Fabian af Enehielm (1780 - 1835)(m. 23 Feb 1813)