8vo

noun

1. 1.A book size, corresponding to the page size.
2. 2.A sheet of paper 7 to 10 inches (= 17.78 to 25.4 cm) high and 4.5 to 6 inches (= 11.43 to 15.24 cm) wide, the size varying with the large original sheet used to create it. It is made by folding the original sheet three times to produce eight leaves.
3. 3.A book of octavo pages.