127 is a roll film format for still photography introduced by Kodak in 1912.
127 film roll with "Baby Brownie" in the background
127 film (center, with spindle) sits between 35 mm (left) and 120 roll film (right) formats in terms of size.
Roll film or rollfilm is any type of spool-wound photographic film protected from white light exposure by a paper backing. The term originated in contrast to sheet film. Confusingly, roll film was originally often referred to as "cartridge" film because of its resemblance to a shotgun cartridge.
A spool of Fujifilm-brand type 120 negative roll film
Classic 120 negative roll film, manufactured by Agfa-Gevaert, with backing paper indicating total exposures available for 4.5×6, 6×6 and 6×9 cm camera film-frame sizes
Various brands of sealed 120 negative and transparency roll films