I used to use a lot of film packs with my 2 1/4 x 3 1/4 Speed Graphic back in the late '50s and early '60s. The film is much thinner than regular sheet film and at least in the 2 1/4 x 3 1/4 was BIGGER than the sheet film (I note that others have said the 4 x 5 version is smaller, IDK) I used to open them in the darkroom all the time to extract just the exposed sheets, but it's probably not a good idea for a first timer.