Folio
In general, the book format resulting from folding a sheet once, making two leaves or four pages. The term specifically refers to a sheet size of 17 x 22 inches or larger. Frequently, it is used to describe any book of the largest size.
VALÉORINE Encyclopedia
VALÉORINE documentary reading
Documentary summary
In general, the book format resulting from folding a sheet once, making two leaves or four pages. The term specifically refers to a sheet size of 17 x 22 inches or larger. Frequently, it is used to describe any book of the largest size.
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Documentary evidence
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identity unresolved · checked 25 September 2026
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In this article
Overview
Frequently, it is used to describe any book of the largest size.
Citations
References
Each reference names the institution holding it, so a reader may go to the document itself.
Institutional database
folio (book format)Getty Research Institute
Verified
The Encyclopedia exists whether or not anything is for sale. Corrections are recorded rather than overwritten, and every version of this record is kept. Published 13 August 2026.
Elsewhere in General
887 published records in this field, each with its sources named.
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Best supported in this field
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