(1) In any press, the most frequently used sizes of pages are demy quarto (1/4), demy octavo (1/8), crown quarto and crown octavo.(2) Reg, Following Pat's email, I think the old Hansard sizes were demy quarto but I could be mistaken.(3) There are many standard formats - Metric Demy Octavo (216 x 138. mm) or Metric Crown Octavo (186 x 123 mm) are common ones.(4) The book is very nicely got up by the publisher in format metric demy 4to (280 mm × 216 mm; 11 in × 8.5 in) and expertly set by the author.(5) All books are in metric Demy format unless otherwise stated.