Many cameras with the right polaroid pack film back can shoot FP-100 eg. medium format, 35mm, large format. Price and availability is something else (esp for 35mm). The actual image size on the 8.5 x 10.5cm paper depends on the format size. If you're using on a 6x6 camera then the image is slightly under 6cm square. The maximum usable image area is 9.5cm x.7.3cm.