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
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
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
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":
Ojciec: Stein Ludwik
(04 kwie. 1808 Poznań, poznański, wielkopolskie, Polska - 15 list. 1876 Września, wrzesiński, wielkopolskie, Polska)
:         ├─Stein Ludwik Aleksander
(11 lip. 1865 Miłosław, wrzesiński, wielkopolskie, Polska - 19 mar. 1868 Września, wrzesiński, wielkopolskie, Polska) :         │
         │          │ Sierszulski Marian
(23 mar. 1902 Pleszew, pleszewski, wielkopolskie, Polska - 27 mar. 1976)
         │          │                    ├─Sobocińska Barbara
         │          │                    └─Sobociński Michał
         │          │          ├─Lisiak Maria
         │          │          │ Narożny Kazimierz
(18 luty 1930 Szamotuły, szamotulski, wielkopolskie, Polska - 12 kwie. 2019)
         │          │          │          └─Narożna Elżbieta
         │          │          │ Walczak Irena
         │          │          │          ├─Lisiak Hanna
         │          │          │          └─Lisiak Tomasz
         │          │          │           Kuczora Anna
         │          │                    ├─Seremak Jerzy
         │          │                    │          └─Seremak Jakub
         │          │                    └─Seremak Hanna
         │          │                     Ciepielewicz Andrzej