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":
         │          └─ Adèle de Vermandois
(Abt 1065 - Yes, date unknown)
         │           Koning Hugues I de France
(1057 - 18 Oct 1102 Tarsus, Türkiye)
         │           :         ├─ Mathilde de Vermandois
(Abt 1080 - Yes, date unknown) =>
         │           :         │ + Heer Raoul I de Baugency
(Abt 1060 - Yes, date unknown)
         │           :         ├─ Constanze de Vermandois
(Abt 1081 - Yes, date unknown)
         │           :         │ + Gottfried I. de la Ferté
(Abt 1075 - Yes, date unknown)
         │           :         ├─ Agnes de Vermandois
(Abt 1083 Valois, Hauts-de-France, France - Yes, date unknown) =>
         │           :         │ + Markgraaf Bonifacio I di Vasto
(Abt 1055 - Yes, date unknown)
         │           :         ├─ Elisabeth de Vermandois
(Abt 1084 - Yes, date unknown) =>
         │           :         │ + Graaf Robert I de Beaumont
(Abt 1046 - Yes, date unknown bur.Abbaye Saint-Pierre de Préaux, Normandie, France)
         │           :         │ + Guillaume II de Warenne
(Abt 1078 - Yes, date unknown)
         │           :         ├─ Raoul I. de Vermandois
(Abt 1085 - Yes, date unknown)
         │           :         │ + Eleonore de Blois
(Abt 1095 - Yes, date unknown)
         │           :         │ + Alix de Poitou
(1124 - Yes, date unknown)
         │           :         │ + Laurette de Lorraine
(Abt 1125 -          │           :         │ 1175 Abbaye de Forest, Bruxelles-Capitale, België)
         │           :         ├─ Simon de Vermandois
(Abt 1087 - 10 Feb 1148 Seleucia, Muḥāfaẓät Baġdād, Irāq)
         │           :         ├─ Heinrich I. de Vermandois
(Abt 1090 - Yes, date unknown)
         │           :         │ + NN
(Yes, date unknown - Yes, date unknown)
         │           :         └─ Beatrix de Vermandois
(Abt 1095 - Yes, date unknown)
         │           :          + Hugues IV. de Gournay
(Abt 1096 Gournay-en-Bray, Normandie, France - 1180 Gournay-en-Bray, Normandie, France)
         │           Reinald III. de Clermont
(Abt 1075 - Yes, date unknown)
         │                    ├─ Margaretha de Clermont
(Abt 1104 - Yes, date unknown)
         │                    │ + Karl I. af Danmark
(Abt 1084 - 02 Mar 1127 Brugge, West-Vlaanderen, België)
         │                    │ + Comte de Saint-Pol Hugues III. de Campdavaine
(Abt 1080 - Yes, date unknown)
         │                    └─ Rudolf de Clermont
(Abt 1106 - Yes, date unknown)
         ├─ Elisabeth de Valois
(Abt 1046 - Yes, date unknown)
         │ + Barthélemy de Broyes
(Abt 1030 - Yes, date unknown)
         ├─ Simon de Crépy
(1048 Bar-sur-Aube, Grand Est, France - 30 Jan 1080 Roma, Italia)
         │ + Almodis de Marche
(Abt 1023 - 16 Oct 1071 Barcelona, Cataluña, España)
         └─ Adélaide de Valois
(Abt 1050 - Yes, date unknown)
          + Graaf Thibaud III de Blois
(Abt 1006 Blois,Centre-Val de Loire, France - 30 Sep 1089 Épernay, Grand Est, France)