An antonym for "folio" could be "compact" or "small."
a folio is a page from a manuscript
ledger folio charges
False Folio was created in 1619.
Folio - magazine - was created in 1985.
Folio Society was created in 1947.
Percy Folio was created in 1867.
Folio Weekly was created in 1987.
Folio Corporation was created in 1987.
Second Folio was created in 1632.
Fiend Folio was created in 1981.
I'm going to need another folio, Watson.