Sf
Proposed by a contributor, not yet supported by evidence.
Also seen as: Sfs
Meaning · English
a book size one sixty-fourth of the size of a standard uncut sheet of paper (less 7.5 cm (3") in height)
Noun
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Common questions
What does “Sf” mean?
a book size one sixty-fourth of the size of a standard uncut sheet of paper (less 7.5 cm (3") in height)
Is “Sf” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.