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)
   │    │    │    │    │ + 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)
   │    │    │    │     + Johann Frederik Standertskjöld (1776 - 1820)(m. 23 Feb 1815)
   │    │    │    ├─Frn. Elisabeth Mellin (2 Feb 1732 - bur.18 Jun 1732)
   │    │    │    ├─Frn. Helena Christina Mellin (chr.12 Apr 1734 - bur.30 Jun 1734)
   │    │    │    ├─Frn. Christina Catharina Mellin (24 Aug 1736 - 16 Mar 1812)
   │    │    │    ├─Frn. Ingrid Juliana Mellin (9 Aug 1738 - 29 Dec 1787)
   │    │    │    │ + Anders Erik Gyldenär (1744 - 1789)(m. 12 Mar 1767)
   │    │    │    ├─Frhr. Frederik Mellin (18 Jul 1740 - bur.31 Aug 1740)
   │    │    │    └─Frhr. Bernt Johan Mellin (25 Jan 1744 Haudois i Akkas - 3 May 1811 Viiala i Akkas)
   │    │    │     Agneta Juliana von Knorring (7 May 1753 - 11 May 1778)(m. 1774)
   │    │    │        ├─Frhr. Axel Gustaf Mellin (2 Jul 1775 Haudois i Akkas - 19 Mar 1856 Helsingfors) =>
   │    │    │        │ + Frn. Magdalena Vilhelmina de Carnall (6 Aug 1792 - 17 Sep 1875 Helsingfors)(m. 19 Nov 1813 Björneborg)
   │    │    │        ├─Frhr. Carl Johan Mellin (21 Dec 1776 Viiala i Akkas - 28 Sep 1817 Haudois i Akkas) =>
   │    │    │        └─Frn. Sofia Juliana Mellin (Viiala i Akkas;11 Mar 1778 - 2 Mar 1835)
   │    │    │         + Frhr. Carl Fabian af Enehielm (1780 - 1835)(m. 23 Feb 1813)
   │ :               └─Baron Stephan Creutz (20 Jun 1788 Slot Horn, Hogby, Oland - 08 Oct 1867 Nijmegen, Gld, NL) =>
   │ :                + Marin Johanna de Waal (Maastricht, L, NL;28 Aug 1797 - 04 Jan 1854)(m. 30 Oct 1820 Maastricht, L, NL)
               │    ├─Frhr. Anders Johan Mellin (26 Mar 1789 - 5 Dec 1813)
               │    ├─Frhr. Carl Reinhold Mellin (22 Sep 1790 - 5 Aug 1869)
               │    │ + Dorotea Catharina Fredrika Stiernwall (20 May 1799 - 31 Mar 1858)(m. 31 Dec 1821)
               │    │ + Maria Forsblom (29 Jun 1829 Fredrikshamn - 22 Sep 1902 Helsingfors)(m. 18 Aug 1859)
               │    ├─Frn. Eva Christina Mellin (22 Apr 1792 - 15 Mar 1819)
               │    │ + Carl Henrik Asp (22 Jun 1779 Karkku - 26 Dec 1846 Vasa)(m. 10 May 1818)