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":
Father: John Billingsley (1587 Astley Abbotts, Shropshire, England - 1659 Netherlands)
Mother: Agatha Cooper (1593 Shropshire, England - 1666 Rotterdam, Zuid-Holland, Netherlands)
William Billingsley
(1628 Shropshire, England - DEC 1657 Richmond, Wise County, Virginia, USA)
Sarah Bowman (1635 Essex County, Virginia, USA - 1690 Richmond County, Virginia, USA)
     └──Sarah Ann Billingsley(1652 Essex County, Virginia, USA - 1712 St Mary's County, Maryland, USA)
      John Billingsley (1647 Rotterdam, Zuid-Holland, Netherlands - 1693 at sea)
      :     ┌──Mary Billingsley(SEP 1669 Calvert County, Maryland, USA -)
      :     │ + Edward Wood (- unknown)
      :     ┌──William Billingsley(OCT 1670 St Mary's County, Maryland, USA - JUL 1716 Calvert County, Maryland, USA)
      :     │ Clearanna Bowles (1670 Calvert County, Maryland, USA - 4 AUG 1716 Calvert County, Maryland, USA)
      :     │      ┌──William Billingsley, Jr.(1691 Calvert County, Maryland, USA - 16 DEC 1745 St Mary's County, Maryland, USA)
      :     │      │ + Mary Emily Sumner (NOV 1696 Calvert County, Maryland, USA - DEC 1740 St Mary's County, Maryland, USA)
      :     │      ┌──Clearanna Billingsley(JAN 1693 Calvert County, Maryland, USA - AFT 1734)
      :     │      │ + Thomas Gilly (- JAN 1720/21 Calvert County, Maryland, USA)
      :     │      ┌──Bowles Billingsley(DEC 1694 Calvert County, Maryland, USA - MAY 1744 St Mary's County, Maryland, USA)
      :     │      ┌──Samuel Billingsley(JAN 1696 Calvert County, Maryland, USA - ABT 1741 St Mary's County, Maryland, USA)
      :     │      └──Ann Elizabeth Billingsley(MAY 1699 Calvert County, Maryland, USA -)
      :     │       + John Wood (- unknown)
      :     ┌──Sarah Agatha Billingsley(1672 Calvert County, Maryland, USA -)
      :     │ + John Stovall (- unknown)
      :     ┌──Elizabeth Billingsley(1675 Calvert County, Maryland, USA -)
      :     │ + William Bowles (- unknown)
      :     ┌──John Billingsley, Jr(1677 Calvert County, Maryland, USA - 1689 Calvert County, Maryland, USA)
      :     ┌──Susanna Billingsley(1679/80 Calvert County, Maryland, USA -)