110 was the number later[1] given by Kodak to a roll film format originally introduced in 1898. 110 film produced 5×4-inch images and was discontinued in October 1929.
110 was one of a large number of different roll film formats introduced by Kodak in the late 19th and early 20th centuries. The 1xx naming system was introduced in 1913 for both existing and new films.[1]
Nowadays, the 110 designation is more commonly associated with the unrelated 110 cartridge-based film format introduced by Kodak in 1972.