When it comes to a lot of photography, 35mm has been the standard for many years. In cinema, Super 35mm has been--and it's around the size of APS-C digital. But what about larger formats? In photography, we've got 120 film and in cinema there's IMAX.
IMAX is considered large format in cinema and arguably it's really beautiful. IMAX film is rated to be around 70mm in size; visually it's really 65mm and 5mm are used for audio. . thephoblographer.com