4to

English

Etymology

From Latin quārtō, ablative case singular of quārtus (“fourth”).

Noun

4to (countable and uncountable, plural 4tos)

  1. (paper) Abbreviation of quarto, a paper size.
  2. (printing) Abbreviation of quarto, a corresponding book size.

Synonyms
  • (paper size): 4º
  • (book size): Q, 4º

See also
English paper and book sizes
Latin folio quarto sexto octavo duodecimo sextodecimo octodecimo vicesimo-quarto trigesimo-secundo quadragesimo-octavo sexagesimo-quarto
ALA F Q   O D S T   Tt Fe Sf
height (cm) > 30 25-30 25-30 20-25 17.5-20 15-17.5 12.5-15 12.5-15 10-12.5 7.5-10 < 7.5
printers' folio quarto sixmo octavo twelvemo sixteenmo eighteenmo twenty-fourmo thirty-twomo forty-eightmo sixty-fourmo
abbrev. fo or f 4to 6to or 6mo 8vo 12mo 16mo 18mo 24mo 32mo 48mo 64mo
abbrev. 2º 4º 6º 8º 12º 16º 18º 24º 32º 48º 64º
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